/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:11:02,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:11:02,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:11:02,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 23:11:02,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:11:02,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:11:02,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:11:02,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:11:02,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:11:02,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:11:02,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:11:02,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:11:02,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:11:02,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:11:02,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:11:02,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:11:02,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 23:11:02,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:11:02,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:11:02,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:11:02,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:11:02,950 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:11:02,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:11:02,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:11:02,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:11:02,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:11:02,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:11:02,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:11:02,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:11:02,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:11:02,952 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:11:02,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:11:02,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:11:02,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:11:02,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:11:02,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:11:02,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:11:02,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:11:02,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:11:02,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:11:02,954 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:11:02,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:11:03,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:11:03,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:11:03,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:11:03,156 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:11:03,156 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:11:03,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2022-01-31 23:11:03,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bcafc4f3/58016b42910f4caf8995c62649c9b742/FLAGdaa4229ac [2022-01-31 23:11:03,554 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:11:03,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2022-01-31 23:11:03,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bcafc4f3/58016b42910f4caf8995c62649c9b742/FLAGdaa4229ac [2022-01-31 23:11:03,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bcafc4f3/58016b42910f4caf8995c62649c9b742 [2022-01-31 23:11:03,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:11:03,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:11:03,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:11:03,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:11:03,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:11:03,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:11:03" (1/1) ... [2022-01-31 23:11:03,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b8d7952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03, skipping insertion in model container [2022-01-31 23:11:03,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:11:03" (1/1) ... [2022-01-31 23:11:03,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:11:03,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:11:03,709 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_monotonic.i[999,1012] [2022-01-31 23:11:03,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:11:03,731 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:11:03,741 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_monotonic.i[999,1012] [2022-01-31 23:11:03,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:11:03,762 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:11:03,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03 WrapperNode [2022-01-31 23:11:03,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:11:03,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:11:03,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:11:03,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:11:03,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03" (1/1) ... [2022-01-31 23:11:03,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03" (1/1) ... [2022-01-31 23:11:03,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03" (1/1) ... [2022-01-31 23:11:03,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03" (1/1) ... [2022-01-31 23:11:03,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03" (1/1) ... [2022-01-31 23:11:03,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03" (1/1) ... [2022-01-31 23:11:03,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03" (1/1) ... [2022-01-31 23:11:03,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:11:03,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:11:03,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:11:03,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:11:03,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03" (1/1) ... [2022-01-31 23:11:03,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:11:03,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:11:03,868 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 23:11:03,886 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 23:11:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:11:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:11:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:11:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:11:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:11:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 23:11:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:11:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:11:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 23:11:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 23:11:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:11:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:11:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:11:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:11:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:11:03,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 23:11:03,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:11:03,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:11:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-31 23:11:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-31 23:11:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:11:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:11:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:11:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:11:04,006 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:11:04,007 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:11:04,137 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:11:04,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:11:04,146 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 23:11:04,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:11:04 BoogieIcfgContainer [2022-01-31 23:11:04,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:11:04,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:11:04,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:11:04,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:11:04,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:11:03" (1/3) ... [2022-01-31 23:11:04,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79038f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:11:04, skipping insertion in model container [2022-01-31 23:11:04,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:03" (2/3) ... [2022-01-31 23:11:04,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79038f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:11:04, skipping insertion in model container [2022-01-31 23:11:04,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:11:04" (3/3) ... [2022-01-31 23:11:04,154 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2022-01-31 23:11:04,160 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:11:04,160 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:11:04,194 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:11:04,200 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=QVASR [2022-01-31 23:11:04,200 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:11:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 23:11:04,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 23:11:04,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:04,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:04,228 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash 135807006, now seen corresponding path program 1 times [2022-01-31 23:11:04,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:04,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863140708] [2022-01-31 23:11:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:04,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:04,281 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:04,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:04,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:04,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863140708] [2022-01-31 23:11:04,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863140708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:04,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:04,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 23:11:04,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858016351] [2022-01-31 23:11:04,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:04,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 23:11:04,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:04,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 23:11:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:11:04,441 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:04,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:04,522 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-01-31 23:11:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 23:11:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 23:11:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:04,529 INFO L225 Difference]: With dead ends: 51 [2022-01-31 23:11:04,530 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 23:11:04,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:11:04,535 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:04,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:11:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 23:11:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2022-01-31 23:11:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-31 23:11:04,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-31 23:11:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:04,568 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-31 23:11:04,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-31 23:11:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 23:11:04,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:04,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:04,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:11:04,570 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1045890869, now seen corresponding path program 1 times [2022-01-31 23:11:04,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:04,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767570991] [2022-01-31 23:11:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:04,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:04,577 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:04,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:04,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:04,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767570991] [2022-01-31 23:11:04,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767570991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:04,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:04,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:11:04,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535757458] [2022-01-31 23:11:04,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:04,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:11:04,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:04,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:11:04,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:11:04,658 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:04,729 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-01-31 23:11:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 23:11:04,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 23:11:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:04,732 INFO L225 Difference]: With dead ends: 43 [2022-01-31 23:11:04,732 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 23:11:04,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 23:11:04,734 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:04,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:11:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 23:11:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-01-31 23:11:04,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-31 23:11:04,742 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-01-31 23:11:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:04,743 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-31 23:11:04,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:04,743 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-31 23:11:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 23:11:04,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:04,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:04,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:11:04,746 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:04,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1435302576, now seen corresponding path program 1 times [2022-01-31 23:11:04,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:04,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030672669] [2022-01-31 23:11:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:04,784 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:04,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:04,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:04,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:04,857 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:04,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030672669] [2022-01-31 23:11:04,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030672669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:04,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:04,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 23:11:04,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019829308] [2022-01-31 23:11:04,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:04,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 23:11:04,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:04,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 23:11:04,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 23:11:04,859 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:04,957 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-01-31 23:11:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:11:04,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 23:11:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:04,958 INFO L225 Difference]: With dead ends: 52 [2022-01-31 23:11:04,958 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 23:11:04,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:11:04,960 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:04,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 23:11:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2022-01-31 23:11:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 23:11:04,964 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2022-01-31 23:11:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:04,964 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 23:11:04,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 23:11:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 23:11:04,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:04,965 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:04,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:11:04,965 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:04,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1914929685, now seen corresponding path program 2 times [2022-01-31 23:11:04,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:04,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343367541] [2022-01-31 23:11:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:04,976 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:04,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:04,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:05,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:05,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:05,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343367541] [2022-01-31 23:11:05,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [343367541] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:05,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:05,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:11:05,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138678118] [2022-01-31 23:11:05,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:05,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:11:05,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:11:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:11:05,050 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:05,108 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-01-31 23:11:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:11:05,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 23:11:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:05,109 INFO L225 Difference]: With dead ends: 61 [2022-01-31 23:11:05,110 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 23:11:05,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:11:05,111 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:05,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 44 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:11:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 23:11:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2022-01-31 23:11:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-31 23:11:05,115 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 22 [2022-01-31 23:11:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:05,115 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-31 23:11:05,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-31 23:11:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 23:11:05,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:05,128 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:05,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:11:05,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash -944910598, now seen corresponding path program 3 times [2022-01-31 23:11:05,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:05,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596076197] [2022-01-31 23:11:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:05,144 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:05,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:05,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:05,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:05,259 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 23:11:05,259 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:05,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596076197] [2022-01-31 23:11:05,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [596076197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:05,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:05,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:11:05,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97758729] [2022-01-31 23:11:05,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:05,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:11:05,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:11:05,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:11:05,265 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:05,367 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-31 23:11:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:11:05,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 23:11:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:05,370 INFO L225 Difference]: With dead ends: 70 [2022-01-31 23:11:05,370 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 23:11:05,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:11:05,375 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:05,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 62 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 23:11:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2022-01-31 23:11:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-31 23:11:05,396 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2022-01-31 23:11:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:05,397 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-31 23:11:05,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-31 23:11:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 23:11:05,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:05,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:05,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 23:11:05,399 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2083708577, now seen corresponding path program 4 times [2022-01-31 23:11:05,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:05,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019805494] [2022-01-31 23:11:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:05,417 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:05,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:05,419 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:05,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:05,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:05,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019805494] [2022-01-31 23:11:05,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019805494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:05,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:05,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 23:11:05,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880612074] [2022-01-31 23:11:05,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:05,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 23:11:05,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:05,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 23:11:05,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:11:05,541 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:05,639 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2022-01-31 23:11:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:11:05,639 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 23:11:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:05,641 INFO L225 Difference]: With dead ends: 79 [2022-01-31 23:11:05,641 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 23:11:05,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:11:05,646 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:05,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 66 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 23:11:05,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-01-31 23:11:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-01-31 23:11:05,657 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 30 [2022-01-31 23:11:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:05,657 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-01-31 23:11:05,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-01-31 23:11:05,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 23:11:05,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:05,658 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:05,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 23:11:05,658 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1585268412, now seen corresponding path program 5 times [2022-01-31 23:11:05,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:05,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987475520] [2022-01-31 23:11:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:05,671 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:05,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:05,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:05,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:05,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987475520] [2022-01-31 23:11:05,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [987475520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:05,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:05,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:11:05,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658145791] [2022-01-31 23:11:05,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:05,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:11:05,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:11:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:11:05,807 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:05,908 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2022-01-31 23:11:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:11:05,908 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 23:11:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:05,909 INFO L225 Difference]: With dead ends: 88 [2022-01-31 23:11:05,909 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 23:11:05,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:11:05,911 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:05,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 62 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 23:11:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2022-01-31 23:11:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-01-31 23:11:05,920 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 34 [2022-01-31 23:11:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:05,921 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-01-31 23:11:05,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:05,921 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-01-31 23:11:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 23:11:05,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:05,924 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:05,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 23:11:05,924 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:05,924 INFO L85 PathProgramCache]: Analyzing trace with hash 959436457, now seen corresponding path program 6 times [2022-01-31 23:11:05,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:05,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517750769] [2022-01-31 23:11:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:05,935 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:05,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:05,937 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:06,061 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:06,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517750769] [2022-01-31 23:11:06,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1517750769] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:06,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:06,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:11:06,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886563980] [2022-01-31 23:11:06,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:06,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:11:06,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:11:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:11:06,063 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:06,169 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2022-01-31 23:11:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:11:06,170 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 23:11:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:06,170 INFO L225 Difference]: With dead ends: 97 [2022-01-31 23:11:06,170 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 23:11:06,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:11:06,171 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 93 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:06,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 74 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 23:11:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 47. [2022-01-31 23:11:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-01-31 23:11:06,181 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 38 [2022-01-31 23:11:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:06,181 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-01-31 23:11:06,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-01-31 23:11:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 23:11:06,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:06,182 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:06,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 23:11:06,182 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:06,183 INFO L85 PathProgramCache]: Analyzing trace with hash -795494002, now seen corresponding path program 7 times [2022-01-31 23:11:06,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:06,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956344345] [2022-01-31 23:11:06,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:06,190 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:06,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:06,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:06,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:06,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956344345] [2022-01-31 23:11:06,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [956344345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:06,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:06,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 23:11:06,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543074298] [2022-01-31 23:11:06,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:06,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 23:11:06,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 23:11:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:11:06,324 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:06,419 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2022-01-31 23:11:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:11:06,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 23:11:06,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:06,420 INFO L225 Difference]: With dead ends: 106 [2022-01-31 23:11:06,420 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 23:11:06,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:11:06,422 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:06,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 75 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 23:11:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 51. [2022-01-31 23:11:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-01-31 23:11:06,426 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 42 [2022-01-31 23:11:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:06,426 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-01-31 23:11:06,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-01-31 23:11:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 23:11:06,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:06,427 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:06,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 23:11:06,427 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1428839949, now seen corresponding path program 8 times [2022-01-31 23:11:06,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:06,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181958637] [2022-01-31 23:11:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:06,433 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:06,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:06,434 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:06,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:06,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181958637] [2022-01-31 23:11:06,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [181958637] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:06,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:06,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:11:06,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237416749] [2022-01-31 23:11:06,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:06,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:11:06,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:11:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:11:06,556 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:06,666 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2022-01-31 23:11:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:11:06,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 23:11:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:06,668 INFO L225 Difference]: With dead ends: 115 [2022-01-31 23:11:06,668 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 23:11:06,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:11:06,668 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 148 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:06,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 88 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:06,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 23:11:06,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2022-01-31 23:11:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-01-31 23:11:06,672 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 46 [2022-01-31 23:11:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:06,672 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-01-31 23:11:06,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-01-31 23:11:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 23:11:06,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:06,673 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:06,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 23:11:06,673 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:06,674 INFO L85 PathProgramCache]: Analyzing trace with hash 410046424, now seen corresponding path program 9 times [2022-01-31 23:11:06,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:06,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978022034] [2022-01-31 23:11:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:06,679 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:06,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:06,681 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:06,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:06,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978022034] [2022-01-31 23:11:06,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [978022034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:06,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:06,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:11:06,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669048726] [2022-01-31 23:11:06,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:06,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:11:06,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:06,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:11:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:11:06,798 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:06,924 INFO L93 Difference]: Finished difference Result 124 states and 159 transitions. [2022-01-31 23:11:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 23:11:06,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 23:11:06,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:06,925 INFO L225 Difference]: With dead ends: 124 [2022-01-31 23:11:06,926 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 23:11:06,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:11:06,926 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 123 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:06,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 98 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 23:11:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 59. [2022-01-31 23:11:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-01-31 23:11:06,930 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 50 [2022-01-31 23:11:06,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:06,931 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-01-31 23:11:06,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-01-31 23:11:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 23:11:06,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:06,931 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:06,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 23:11:06,932 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash -951549123, now seen corresponding path program 10 times [2022-01-31 23:11:06,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:06,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130568834] [2022-01-31 23:11:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:06,938 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:06,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:06,940 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:07,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:07,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130568834] [2022-01-31 23:11:07,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [130568834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:07,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:07,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 23:11:07,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985290438] [2022-01-31 23:11:07,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:07,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 23:11:07,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:07,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 23:11:07,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:11:07,089 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:07,219 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2022-01-31 23:11:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:11:07,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 23:11:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:07,220 INFO L225 Difference]: With dead ends: 133 [2022-01-31 23:11:07,220 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 23:11:07,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:11:07,221 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 176 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:07,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 101 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 23:11:07,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2022-01-31 23:11:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-01-31 23:11:07,233 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 54 [2022-01-31 23:11:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:07,233 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-01-31 23:11:07,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,233 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-01-31 23:11:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 23:11:07,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:07,234 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:07,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 23:11:07,234 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash 312343586, now seen corresponding path program 11 times [2022-01-31 23:11:07,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:07,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210509758] [2022-01-31 23:11:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:07,239 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:07,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:07,241 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:07,387 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:07,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210509758] [2022-01-31 23:11:07,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [210509758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:07,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:07,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:11:07,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286171688] [2022-01-31 23:11:07,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:07,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:11:07,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:07,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:11:07,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:11:07,388 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:07,523 INFO L93 Difference]: Finished difference Result 142 states and 183 transitions. [2022-01-31 23:11:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:11:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 23:11:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:07,525 INFO L225 Difference]: With dead ends: 142 [2022-01-31 23:11:07,525 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 23:11:07,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:11:07,525 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 167 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:07,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 116 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 23:11:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 67. [2022-01-31 23:11:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-01-31 23:11:07,552 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 58 [2022-01-31 23:11:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:07,552 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-01-31 23:11:07,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-01-31 23:11:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 23:11:07,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:07,553 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:07,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 23:11:07,554 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:07,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:07,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1393719943, now seen corresponding path program 12 times [2022-01-31 23:11:07,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:07,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131415775] [2022-01-31 23:11:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:07,560 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:07,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:07,562 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:07,724 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:07,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131415775] [2022-01-31 23:11:07,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131415775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:07,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:07,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:11:07,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540710076] [2022-01-31 23:11:07,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:07,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:11:07,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:07,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:11:07,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:11:07,725 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:07,866 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2022-01-31 23:11:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 23:11:07,867 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 23:11:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:07,868 INFO L225 Difference]: With dead ends: 151 [2022-01-31 23:11:07,868 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 23:11:07,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:11:07,869 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 169 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:07,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 125 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 23:11:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 71. [2022-01-31 23:11:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-01-31 23:11:07,874 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 62 [2022-01-31 23:11:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:07,874 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-01-31 23:11:07,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-01-31 23:11:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:11:07,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:07,875 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:07,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 23:11:07,875 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash 782712428, now seen corresponding path program 13 times [2022-01-31 23:11:07,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:07,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810110968] [2022-01-31 23:11:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:07,881 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:07,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:07,884 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:08,086 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:08,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810110968] [2022-01-31 23:11:08,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [810110968] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:08,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:08,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 23:11:08,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870722462] [2022-01-31 23:11:08,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:08,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 23:11:08,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:08,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 23:11:08,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:11:08,087 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:08,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:08,257 INFO L93 Difference]: Finished difference Result 160 states and 207 transitions. [2022-01-31 23:11:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 23:11:08,268 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 23:11:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:08,269 INFO L225 Difference]: With dead ends: 160 [2022-01-31 23:11:08,269 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 23:11:08,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:11:08,269 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 210 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:08,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 123 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:08,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 23:11:08,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 75. [2022-01-31 23:11:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2022-01-31 23:11:08,273 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 66 [2022-01-31 23:11:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:08,273 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2022-01-31 23:11:08,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2022-01-31 23:11:08,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 23:11:08,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:08,274 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:08,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 23:11:08,274 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash -390232111, now seen corresponding path program 14 times [2022-01-31 23:11:08,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:08,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601040913] [2022-01-31 23:11:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:08,279 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:08,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:08,281 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:08,505 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:08,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601040913] [2022-01-31 23:11:08,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601040913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:08,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:08,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:11:08,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042884877] [2022-01-31 23:11:08,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:08,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:11:08,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:08,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:11:08,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:11:08,506 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:08,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:08,673 INFO L93 Difference]: Finished difference Result 169 states and 219 transitions. [2022-01-31 23:11:08,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:11:08,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 23:11:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:08,676 INFO L225 Difference]: With dead ends: 169 [2022-01-31 23:11:08,676 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 23:11:08,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:11:08,677 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 213 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:08,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 139 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:08,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 23:11:08,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 79. [2022-01-31 23:11:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-01-31 23:11:08,683 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 70 [2022-01-31 23:11:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:08,683 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-01-31 23:11:08,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-01-31 23:11:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 23:11:08,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:08,687 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:08,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 23:11:08,687 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1307142474, now seen corresponding path program 15 times [2022-01-31 23:11:08,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:08,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837069438] [2022-01-31 23:11:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:08,692 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:08,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:08,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:08,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:08,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837069438] [2022-01-31 23:11:08,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [837069438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:08,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:08,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:11:08,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602473482] [2022-01-31 23:11:08,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:08,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:11:08,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:08,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:11:08,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:11:08,894 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:09,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:09,077 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2022-01-31 23:11:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:11:09,077 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 23:11:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:09,078 INFO L225 Difference]: With dead ends: 178 [2022-01-31 23:11:09,078 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 23:11:09,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:11:09,080 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:09,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 160 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 23:11:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 83. [2022-01-31 23:11:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 77 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-01-31 23:11:09,085 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 74 [2022-01-31 23:11:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:09,086 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-01-31 23:11:09,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-01-31 23:11:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 23:11:09,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:09,087 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:09,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 23:11:09,087 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash -120345829, now seen corresponding path program 16 times [2022-01-31 23:11:09,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:09,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217641380] [2022-01-31 23:11:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:09,092 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:09,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:09,095 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:09,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:09,314 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:09,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217641380] [2022-01-31 23:11:09,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1217641380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:09,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:09,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:11:09,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532245367] [2022-01-31 23:11:09,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:09,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:11:09,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:11:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:11:09,316 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:09,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:09,514 INFO L93 Difference]: Finished difference Result 187 states and 243 transitions. [2022-01-31 23:11:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 23:11:09,514 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 23:11:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:09,515 INFO L225 Difference]: With dead ends: 187 [2022-01-31 23:11:09,515 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 23:11:09,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:11:09,516 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 246 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:09,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 153 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 23:11:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 87. [2022-01-31 23:11:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 81 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-01-31 23:11:09,523 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 78 [2022-01-31 23:11:09,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:09,523 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-01-31 23:11:09,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:09,524 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-01-31 23:11:09,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 23:11:09,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:09,524 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:09,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 23:11:09,524 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:09,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1200225024, now seen corresponding path program 17 times [2022-01-31 23:11:09,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:09,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602861318] [2022-01-31 23:11:09,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:09,530 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:09,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:09,534 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:09,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:09,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:09,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602861318] [2022-01-31 23:11:09,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602861318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:09,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:09,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:11:09,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271263950] [2022-01-31 23:11:09,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:09,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:11:09,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:09,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:11:09,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:11:09,782 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:09,982 INFO L93 Difference]: Finished difference Result 196 states and 255 transitions. [2022-01-31 23:11:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 23:11:09,982 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 23:11:09,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:09,983 INFO L225 Difference]: With dead ends: 196 [2022-01-31 23:11:09,983 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 23:11:09,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:11:09,984 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 320 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:09,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 154 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 23:11:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 91. [2022-01-31 23:11:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 85 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-01-31 23:11:09,988 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 82 [2022-01-31 23:11:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:09,988 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-01-31 23:11:09,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:09,988 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-01-31 23:11:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 23:11:09,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:09,989 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:09,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 23:11:09,989 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash -908139419, now seen corresponding path program 18 times [2022-01-31 23:11:09,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:09,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075651990] [2022-01-31 23:11:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:09,995 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:09,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:09,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:10,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:10,244 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 23:11:10,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:10,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075651990] [2022-01-31 23:11:10,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075651990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:10,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:10,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 23:11:10,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566810284] [2022-01-31 23:11:10,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:10,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 23:11:10,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:10,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 23:11:10,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:11:10,245 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:10,448 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2022-01-31 23:11:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 23:11:10,449 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 23:11:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:10,450 INFO L225 Difference]: With dead ends: 205 [2022-01-31 23:11:10,450 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 23:11:10,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:11:10,451 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 279 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:10,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 169 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 23:11:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 95. [2022-01-31 23:11:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.247191011235955) internal successors, (111), 89 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2022-01-31 23:11:10,458 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 86 [2022-01-31 23:11:10,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:10,458 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2022-01-31 23:11:10,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2022-01-31 23:11:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 23:11:10,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:10,458 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:10,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 23:11:10,459 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash 860850506, now seen corresponding path program 19 times [2022-01-31 23:11:10,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:10,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914022392] [2022-01-31 23:11:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:10,464 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:10,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:10,468 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:10,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:10,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914022392] [2022-01-31 23:11:10,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [914022392] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:10,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:10,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 23:11:10,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470371784] [2022-01-31 23:11:10,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:10,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 23:11:10,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 23:11:10,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:11:10,769 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:10,965 INFO L93 Difference]: Finished difference Result 214 states and 279 transitions. [2022-01-31 23:11:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 23:11:10,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 23:11:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:10,967 INFO L225 Difference]: With dead ends: 214 [2022-01-31 23:11:10,967 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 23:11:10,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:11:10,967 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 331 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:10,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 160 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 23:11:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 99. [2022-01-31 23:11:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2022-01-31 23:11:10,971 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 90 [2022-01-31 23:11:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:10,972 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2022-01-31 23:11:10,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:10,972 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2022-01-31 23:11:10,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 23:11:10,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:10,972 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:10,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 23:11:10,973 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2020160431, now seen corresponding path program 20 times [2022-01-31 23:11:10,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:10,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988292359] [2022-01-31 23:11:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:10,982 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:10,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:10,986 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:11,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:11,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:11,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988292359] [2022-01-31 23:11:11,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [988292359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:11,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:11,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 23:11:11,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7408362] [2022-01-31 23:11:11,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:11,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 23:11:11,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:11,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 23:11:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:11:11,278 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:11,519 INFO L93 Difference]: Finished difference Result 223 states and 291 transitions. [2022-01-31 23:11:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 23:11:11,527 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 23:11:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:11,528 INFO L225 Difference]: With dead ends: 223 [2022-01-31 23:11:11,529 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 23:11:11,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2022-01-31 23:11:11,529 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 391 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:11,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 163 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 23:11:11,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 103. [2022-01-31 23:11:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.2474226804123711) internal successors, (121), 97 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-01-31 23:11:11,535 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 94 [2022-01-31 23:11:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:11,535 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-01-31 23:11:11,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-01-31 23:11:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 23:11:11,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:11,536 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:11,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 23:11:11,536 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:11,536 INFO L85 PathProgramCache]: Analyzing trace with hash -366140524, now seen corresponding path program 21 times [2022-01-31 23:11:11,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:11,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312114135] [2022-01-31 23:11:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:11,541 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:11,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:11,547 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:11,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:11,863 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:11,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312114135] [2022-01-31 23:11:11,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [312114135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:11,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:11,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 23:11:11,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102694667] [2022-01-31 23:11:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:11,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 23:11:11,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 23:11:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 23:11:11,864 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:12,092 INFO L93 Difference]: Finished difference Result 232 states and 303 transitions. [2022-01-31 23:11:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 23:11:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 23:11:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:12,093 INFO L225 Difference]: With dead ends: 232 [2022-01-31 23:11:12,093 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 23:11:12,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 23:11:12,094 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 383 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 173 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 23:11:12,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 173 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 23:11:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 107. [2022-01-31 23:11:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 101 states have (on average 1.2475247524752475) internal successors, (126), 101 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2022-01-31 23:11:12,098 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 98 [2022-01-31 23:11:12,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:12,098 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2022-01-31 23:11:12,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2022-01-31 23:11:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 23:11:12,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:12,099 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:12,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 23:11:12,099 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:12,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:12,100 INFO L85 PathProgramCache]: Analyzing trace with hash -151217927, now seen corresponding path program 22 times [2022-01-31 23:11:12,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:12,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976050276] [2022-01-31 23:11:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:12,104 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:12,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:12,108 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:12,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:12,425 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:12,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976050276] [2022-01-31 23:11:12,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1976050276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:12,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:12,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 23:11:12,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987515341] [2022-01-31 23:11:12,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:12,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 23:11:12,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 23:11:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 23:11:12,427 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:12,663 INFO L93 Difference]: Finished difference Result 241 states and 315 transitions. [2022-01-31 23:11:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 23:11:12,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 23:11:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:12,664 INFO L225 Difference]: With dead ends: 241 [2022-01-31 23:11:12,664 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 23:11:12,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 23:11:12,665 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 378 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:12,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 185 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 23:11:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 111. [2022-01-31 23:11:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2022-01-31 23:11:12,669 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 102 [2022-01-31 23:11:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:12,669 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2022-01-31 23:11:12,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2022-01-31 23:11:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 23:11:12,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:12,670 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:12,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 23:11:12,670 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2056836062, now seen corresponding path program 23 times [2022-01-31 23:11:12,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210163836] [2022-01-31 23:11:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:12,677 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:12,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:12,682 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:13,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:13,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:13,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210163836] [2022-01-31 23:11:13,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210163836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:13,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:13,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 23:11:13,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718192997] [2022-01-31 23:11:13,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:13,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 23:11:13,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 23:11:13,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 23:11:13,041 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:13,300 INFO L93 Difference]: Finished difference Result 250 states and 327 transitions. [2022-01-31 23:11:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 23:11:13,301 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 23:11:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:13,302 INFO L225 Difference]: With dead ends: 250 [2022-01-31 23:11:13,302 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 23:11:13,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:11:13,303 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 465 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:13,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 186 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 23:11:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 115. [2022-01-31 23:11:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 109 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2022-01-31 23:11:13,307 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 106 [2022-01-31 23:11:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:13,307 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2022-01-31 23:11:13,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2022-01-31 23:11:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 23:11:13,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:13,308 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:13,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 23:11:13,308 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash 237179971, now seen corresponding path program 24 times [2022-01-31 23:11:13,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:13,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877476948] [2022-01-31 23:11:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:13,313 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:13,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:13,318 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:13,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:13,658 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:13,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877476948] [2022-01-31 23:11:13,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877476948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:13,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:13,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 23:11:13,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492604679] [2022-01-31 23:11:13,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:13,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 23:11:13,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:13,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 23:11:13,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:11:13,659 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:13,921 INFO L93 Difference]: Finished difference Result 259 states and 339 transitions. [2022-01-31 23:11:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 23:11:13,925 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 23:11:13,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:13,926 INFO L225 Difference]: With dead ends: 259 [2022-01-31 23:11:13,927 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 23:11:13,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:11:13,927 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 392 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:13,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 204 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 23:11:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 119. [2022-01-31 23:11:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 113 states have (on average 1.247787610619469) internal successors, (141), 113 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2022-01-31 23:11:13,934 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 110 [2022-01-31 23:11:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:13,934 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2022-01-31 23:11:13,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2022-01-31 23:11:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 23:11:13,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:13,935 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:13,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 23:11:13,935 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:13,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1478269480, now seen corresponding path program 25 times [2022-01-31 23:11:13,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:13,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541133544] [2022-01-31 23:11:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:13,944 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:13,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:13,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:14,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:14,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:14,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541133544] [2022-01-31 23:11:14,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541133544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:14,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:14,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 23:11:14,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705842733] [2022-01-31 23:11:14,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:14,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 23:11:14,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 23:11:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:11:14,322 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:14,596 INFO L93 Difference]: Finished difference Result 268 states and 351 transitions. [2022-01-31 23:11:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 23:11:14,596 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 23:11:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:14,598 INFO L225 Difference]: With dead ends: 268 [2022-01-31 23:11:14,598 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 23:11:14,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:11:14,598 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 404 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:14,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 212 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:14,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 23:11:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 123. [2022-01-31 23:11:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 117 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2022-01-31 23:11:14,603 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 114 [2022-01-31 23:11:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:14,603 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2022-01-31 23:11:14,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2022-01-31 23:11:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 23:11:14,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:14,604 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:14,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 23:11:14,604 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:14,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1550230925, now seen corresponding path program 26 times [2022-01-31 23:11:14,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:14,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374832410] [2022-01-31 23:11:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:14,609 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:14,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:14,615 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:15,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:15,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:15,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374832410] [2022-01-31 23:11:15,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [374832410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:15,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:15,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 23:11:15,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495956718] [2022-01-31 23:11:15,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:15,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 23:11:15,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:15,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 23:11:15,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:11:15,027 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 30 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:15,335 INFO L93 Difference]: Finished difference Result 277 states and 363 transitions. [2022-01-31 23:11:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 23:11:15,335 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-01-31 23:11:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:15,336 INFO L225 Difference]: With dead ends: 277 [2022-01-31 23:11:15,336 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 23:11:15,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:11:15,337 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 544 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:15,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 199 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 23:11:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 127. [2022-01-31 23:11:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 156 transitions. [2022-01-31 23:11:15,342 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 156 transitions. Word has length 118 [2022-01-31 23:11:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:15,342 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 156 transitions. [2022-01-31 23:11:15,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 156 transitions. [2022-01-31 23:11:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 23:11:15,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:15,343 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:15,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 23:11:15,343 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:15,343 INFO L85 PathProgramCache]: Analyzing trace with hash -868059534, now seen corresponding path program 27 times [2022-01-31 23:11:15,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:15,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981616070] [2022-01-31 23:11:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:15,348 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:15,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:15,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:15,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:15,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:15,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981616070] [2022-01-31 23:11:15,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [981616070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:15,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:15,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 23:11:15,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108804817] [2022-01-31 23:11:15,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:15,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 23:11:15,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:15,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 23:11:15,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:11:15,782 INFO L87 Difference]: Start difference. First operand 127 states and 156 transitions. Second operand has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 30 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:16,080 INFO L93 Difference]: Finished difference Result 286 states and 375 transitions. [2022-01-31 23:11:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 23:11:16,087 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 30 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 23:11:16,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:16,089 INFO L225 Difference]: With dead ends: 286 [2022-01-31 23:11:16,089 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 23:11:16,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:11:16,090 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 511 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:16,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 214 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:16,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 23:11:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 131. [2022-01-31 23:11:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.248) internal successors, (156), 125 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2022-01-31 23:11:16,096 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 122 [2022-01-31 23:11:16,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:16,096 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2022-01-31 23:11:16,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 30 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:16,096 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2022-01-31 23:11:16,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 23:11:16,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:16,096 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:16,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 23:11:16,097 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1448168663, now seen corresponding path program 28 times [2022-01-31 23:11:16,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:16,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370816411] [2022-01-31 23:11:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:16,101 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:16,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:16,107 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:16,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:16,563 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:16,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370816411] [2022-01-31 23:11:16,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [370816411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:16,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:16,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 23:11:16,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692741256] [2022-01-31 23:11:16,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:16,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 23:11:16,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:16,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 23:11:16,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:11:16,565 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand has 32 states, 32 states have (on average 3.8125) internal successors, (122), 31 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:16,867 INFO L93 Difference]: Finished difference Result 295 states and 387 transitions. [2022-01-31 23:11:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 23:11:16,868 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.8125) internal successors, (122), 31 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-01-31 23:11:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:16,869 INFO L225 Difference]: With dead ends: 295 [2022-01-31 23:11:16,869 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 23:11:16,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 23:11:16,870 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 604 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:16,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 215 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 23:11:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 135. [2022-01-31 23:11:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.248062015503876) internal successors, (161), 129 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 166 transitions. [2022-01-31 23:11:16,875 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 166 transitions. Word has length 126 [2022-01-31 23:11:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:16,875 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 166 transitions. [2022-01-31 23:11:16,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.8125) internal successors, (122), 31 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 166 transitions. [2022-01-31 23:11:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 23:11:16,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:16,875 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:16,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 23:11:16,876 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash -158046020, now seen corresponding path program 29 times [2022-01-31 23:11:16,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:16,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458705371] [2022-01-31 23:11:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:16,886 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:16,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:16,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:17,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:17,336 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:17,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458705371] [2022-01-31 23:11:17,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [458705371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:17,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:17,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 23:11:17,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792835600] [2022-01-31 23:11:17,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:17,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 23:11:17,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:17,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 23:11:17,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 23:11:17,338 INFO L87 Difference]: Start difference. First operand 135 states and 166 transitions. Second operand has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 32 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:17,695 INFO L93 Difference]: Finished difference Result 304 states and 399 transitions. [2022-01-31 23:11:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 23:11:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 32 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-01-31 23:11:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:17,696 INFO L225 Difference]: With dead ends: 304 [2022-01-31 23:11:17,696 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 23:11:17,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:11:17,697 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 556 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:17,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 242 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 23:11:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 139. [2022-01-31 23:11:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 133 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2022-01-31 23:11:17,702 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 130 [2022-01-31 23:11:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:17,702 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2022-01-31 23:11:17,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 32 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2022-01-31 23:11:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 23:11:17,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:17,703 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:17,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 23:11:17,703 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1181551137, now seen corresponding path program 30 times [2022-01-31 23:11:17,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:17,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138230402] [2022-01-31 23:11:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:17,708 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:17,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:17,715 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:18,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:18,211 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 23:11:18,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:18,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138230402] [2022-01-31 23:11:18,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138230402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:18,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:18,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 23:11:18,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642307335] [2022-01-31 23:11:18,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:18,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 23:11:18,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:18,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 23:11:18,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:11:18,212 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:18,560 INFO L93 Difference]: Finished difference Result 313 states and 411 transitions. [2022-01-31 23:11:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 23:11:18,560 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-01-31 23:11:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:18,561 INFO L225 Difference]: With dead ends: 313 [2022-01-31 23:11:18,561 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 23:11:18,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 23:11:18,562 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 545 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:18,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 246 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:18,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 23:11:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 143. [2022-01-31 23:11:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 137 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2022-01-31 23:11:18,567 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 134 [2022-01-31 23:11:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:18,567 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2022-01-31 23:11:18,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2022-01-31 23:11:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 23:11:18,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:18,568 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:18,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 23:11:18,568 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash -862162682, now seen corresponding path program 31 times [2022-01-31 23:11:18,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:18,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517424532] [2022-01-31 23:11:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:18,573 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:18,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:18,581 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:19,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:19,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:19,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517424532] [2022-01-31 23:11:19,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [517424532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:19,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:19,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 23:11:19,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884910097] [2022-01-31 23:11:19,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:19,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 23:11:19,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:19,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 23:11:19,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 23:11:19,146 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand has 35 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 34 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:19,496 INFO L93 Difference]: Finished difference Result 322 states and 423 transitions. [2022-01-31 23:11:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 23:11:19,496 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 34 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-01-31 23:11:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:19,498 INFO L225 Difference]: With dead ends: 322 [2022-01-31 23:11:19,498 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 23:11:19,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:11:19,499 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 537 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:19,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 253 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 23:11:19,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 147. [2022-01-31 23:11:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 141 states have (on average 1.24822695035461) internal successors, (176), 141 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 181 transitions. [2022-01-31 23:11:19,504 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 181 transitions. Word has length 138 [2022-01-31 23:11:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:19,504 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 181 transitions. [2022-01-31 23:11:19,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 34 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2022-01-31 23:11:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 23:11:19,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:19,505 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:19,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 23:11:19,505 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:19,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1296293227, now seen corresponding path program 32 times [2022-01-31 23:11:19,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:19,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079459121] [2022-01-31 23:11:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:19,510 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:19,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:19,517 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:20,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:20,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:20,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079459121] [2022-01-31 23:11:20,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2079459121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:20,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:20,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 23:11:20,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473014965] [2022-01-31 23:11:20,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:20,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 23:11:20,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:20,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 23:11:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:11:20,058 INFO L87 Difference]: Start difference. First operand 147 states and 181 transitions. Second operand has 36 states, 36 states have (on average 3.8333333333333335) internal successors, (138), 35 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:20,422 INFO L93 Difference]: Finished difference Result 331 states and 435 transitions. [2022-01-31 23:11:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 23:11:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.8333333333333335) internal successors, (138), 35 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 23:11:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:20,424 INFO L225 Difference]: With dead ends: 331 [2022-01-31 23:11:20,424 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 23:11:20,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:11:20,424 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 525 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:20,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 271 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:20,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 23:11:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 151. [2022-01-31 23:11:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 145 states have (on average 1.2482758620689656) internal successors, (181), 145 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2022-01-31 23:11:20,433 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 142 [2022-01-31 23:11:20,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:20,433 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2022-01-31 23:11:20,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.8333333333333335) internal successors, (138), 35 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2022-01-31 23:11:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 23:11:20,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:20,434 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:20,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 23:11:20,434 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:20,434 INFO L85 PathProgramCache]: Analyzing trace with hash 434409296, now seen corresponding path program 33 times [2022-01-31 23:11:20,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:20,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877889265] [2022-01-31 23:11:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:20,440 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:20,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:20,448 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:20,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:21,001 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877889265] [2022-01-31 23:11:21,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [877889265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:21,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:21,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:11:21,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871871471] [2022-01-31 23:11:21,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:21,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:11:21,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:21,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:11:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:11:21,003 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 36 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:21,365 INFO L93 Difference]: Finished difference Result 340 states and 447 transitions. [2022-01-31 23:11:21,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 23:11:21,365 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 36 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 23:11:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:21,367 INFO L225 Difference]: With dead ends: 340 [2022-01-31 23:11:21,367 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 23:11:21,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:11:21,368 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 538 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:21,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 265 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:21,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 23:11:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 155. [2022-01-31 23:11:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 149 states have (on average 1.2483221476510067) internal successors, (186), 149 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2022-01-31 23:11:21,374 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 146 [2022-01-31 23:11:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:21,375 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2022-01-31 23:11:21,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 36 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2022-01-31 23:11:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 23:11:21,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:21,375 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:21,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 23:11:21,376 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:21,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:21,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1633666741, now seen corresponding path program 34 times [2022-01-31 23:11:21,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:21,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169899639] [2022-01-31 23:11:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:21,381 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:21,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:21,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:22,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:22,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:22,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169899639] [2022-01-31 23:11:22,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [169899639] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:22,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:22,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 23:11:22,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673917128] [2022-01-31 23:11:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:22,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 23:11:22,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 23:11:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:11:22,016 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 37 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:22,393 INFO L93 Difference]: Finished difference Result 349 states and 459 transitions. [2022-01-31 23:11:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 23:11:22,394 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 37 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 23:11:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:22,395 INFO L225 Difference]: With dead ends: 349 [2022-01-31 23:11:22,395 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 23:11:22,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:11:22,396 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 683 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:22,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 268 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:22,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 23:11:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 159. [2022-01-31 23:11:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 153 states have (on average 1.2483660130718954) internal successors, (191), 153 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2022-01-31 23:11:22,402 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 150 [2022-01-31 23:11:22,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:22,402 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2022-01-31 23:11:22,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 37 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:22,402 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2022-01-31 23:11:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 23:11:22,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:22,403 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:22,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 23:11:22,403 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:22,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2146878362, now seen corresponding path program 35 times [2022-01-31 23:11:22,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:22,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101211676] [2022-01-31 23:11:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:22,415 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:22,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:22,425 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:23,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:23,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:23,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101211676] [2022-01-31 23:11:23,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [101211676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:23,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:23,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 23:11:23,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117555822] [2022-01-31 23:11:23,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:23,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 23:11:23,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:23,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 23:11:23,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:11:23,011 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:23,425 INFO L93 Difference]: Finished difference Result 358 states and 471 transitions. [2022-01-31 23:11:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 23:11:23,426 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-01-31 23:11:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:23,427 INFO L225 Difference]: With dead ends: 358 [2022-01-31 23:11:23,427 INFO L226 Difference]: Without dead ends: 346 [2022-01-31 23:11:23,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:11:23,428 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 771 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:23,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 261 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-31 23:11:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 163. [2022-01-31 23:11:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.2484076433121019) internal successors, (196), 157 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2022-01-31 23:11:23,433 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 154 [2022-01-31 23:11:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:23,433 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2022-01-31 23:11:23,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2022-01-31 23:11:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 23:11:23,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:23,434 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:23,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 23:11:23,434 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1330300415, now seen corresponding path program 36 times [2022-01-31 23:11:23,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:23,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184804152] [2022-01-31 23:11:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:23,438 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:23,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:23,448 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:24,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:24,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:24,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184804152] [2022-01-31 23:11:24,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184804152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:24,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:24,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:11:24,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135360522] [2022-01-31 23:11:24,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:24,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:11:24,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:24,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:11:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:11:24,050 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand has 40 states, 40 states have (on average 3.85) internal successors, (154), 39 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:24,451 INFO L93 Difference]: Finished difference Result 367 states and 483 transitions. [2022-01-31 23:11:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 23:11:24,451 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.85) internal successors, (154), 39 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-01-31 23:11:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:24,453 INFO L225 Difference]: With dead ends: 367 [2022-01-31 23:11:24,453 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 23:11:24,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:11:24,454 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 590 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:24,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 288 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 23:11:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 167. [2022-01-31 23:11:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 161 states have (on average 1.2484472049689441) internal successors, (201), 161 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 206 transitions. [2022-01-31 23:11:24,460 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 206 transitions. Word has length 158 [2022-01-31 23:11:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:24,460 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 206 transitions. [2022-01-31 23:11:24,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.85) internal successors, (154), 39 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 206 transitions. [2022-01-31 23:11:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 23:11:24,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:24,461 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:24,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 23:11:24,462 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:24,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1985809892, now seen corresponding path program 37 times [2022-01-31 23:11:24,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:24,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528284484] [2022-01-31 23:11:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:24,467 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:24,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:24,477 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:25,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:25,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:25,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528284484] [2022-01-31 23:11:25,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [528284484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:25,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:25,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 23:11:25,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777390662] [2022-01-31 23:11:25,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:25,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 23:11:25,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 23:11:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:11:25,198 INFO L87 Difference]: Start difference. First operand 167 states and 206 transitions. Second operand has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 40 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:25,647 INFO L93 Difference]: Finished difference Result 376 states and 495 transitions. [2022-01-31 23:11:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 23:11:25,647 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 40 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-01-31 23:11:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:25,649 INFO L225 Difference]: With dead ends: 376 [2022-01-31 23:11:25,649 INFO L226 Difference]: Without dead ends: 364 [2022-01-31 23:11:25,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:11:25,650 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 523 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:25,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 314 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-31 23:11:25,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 171. [2022-01-31 23:11:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.2484848484848485) internal successors, (206), 165 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 211 transitions. [2022-01-31 23:11:25,655 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 211 transitions. Word has length 162 [2022-01-31 23:11:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:25,655 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 211 transitions. [2022-01-31 23:11:25,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 40 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 211 transitions. [2022-01-31 23:11:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 23:11:25,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:25,656 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:25,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 23:11:25,656 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:25,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1181820087, now seen corresponding path program 38 times [2022-01-31 23:11:25,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:25,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652864384] [2022-01-31 23:11:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:25,661 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:25,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:25,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:26,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:26,339 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:26,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652864384] [2022-01-31 23:11:26,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1652864384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:26,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:26,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 23:11:26,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168409176] [2022-01-31 23:11:26,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:26,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 23:11:26,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:26,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 23:11:26,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:11:26,341 INFO L87 Difference]: Start difference. First operand 171 states and 211 transitions. Second operand has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 41 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:26,780 INFO L93 Difference]: Finished difference Result 385 states and 507 transitions. [2022-01-31 23:11:26,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 23:11:26,780 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 41 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-01-31 23:11:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:26,782 INFO L225 Difference]: With dead ends: 385 [2022-01-31 23:11:26,782 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 23:11:26,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:11:26,782 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 633 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:26,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 302 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 23:11:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 175. [2022-01-31 23:11:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 169 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 216 transitions. [2022-01-31 23:11:26,787 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 216 transitions. Word has length 166 [2022-01-31 23:11:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:26,788 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 216 transitions. [2022-01-31 23:11:26,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 41 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:26,788 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 216 transitions. [2022-01-31 23:11:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 23:11:26,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:26,788 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:26,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 23:11:26,789 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:26,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:26,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1252093486, now seen corresponding path program 39 times [2022-01-31 23:11:26,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:26,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480458521] [2022-01-31 23:11:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:26,793 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:26,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:26,803 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:27,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:27,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:27,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480458521] [2022-01-31 23:11:27,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1480458521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:27,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:27,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 23:11:27,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175719465] [2022-01-31 23:11:27,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:27,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 23:11:27,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:27,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 23:11:27,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:11:27,469 INFO L87 Difference]: Start difference. First operand 175 states and 216 transitions. Second operand has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 42 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:27,897 INFO L93 Difference]: Finished difference Result 394 states and 519 transitions. [2022-01-31 23:11:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 23:11:27,897 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 42 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-01-31 23:11:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:27,899 INFO L225 Difference]: With dead ends: 394 [2022-01-31 23:11:27,899 INFO L226 Difference]: Without dead ends: 382 [2022-01-31 23:11:27,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=906, Invalid=986, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:11:27,900 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 741 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:27,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 294 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-01-31 23:11:27,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 179. [2022-01-31 23:11:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 173 states have (on average 1.2485549132947977) internal successors, (216), 173 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 221 transitions. [2022-01-31 23:11:27,906 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 221 transitions. Word has length 170 [2022-01-31 23:11:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:27,906 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 221 transitions. [2022-01-31 23:11:27,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 42 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 221 transitions. [2022-01-31 23:11:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 23:11:27,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:27,907 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:27,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 23:11:27,907 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:27,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:27,907 INFO L85 PathProgramCache]: Analyzing trace with hash 414582419, now seen corresponding path program 40 times [2022-01-31 23:11:27,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:27,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439086652] [2022-01-31 23:11:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:27,912 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:27,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:27,927 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:28,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:28,675 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:28,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439086652] [2022-01-31 23:11:28,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [439086652] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:28,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:28,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 23:11:28,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995089919] [2022-01-31 23:11:28,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:28,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 23:11:28,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 23:11:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:11:28,677 INFO L87 Difference]: Start difference. First operand 179 states and 221 transitions. Second operand has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 43 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:29,113 INFO L93 Difference]: Finished difference Result 403 states and 531 transitions. [2022-01-31 23:11:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 23:11:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 43 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 23:11:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:29,114 INFO L225 Difference]: With dead ends: 403 [2022-01-31 23:11:29,114 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 23:11:29,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=949, Invalid=1031, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:11:29,115 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 703 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:29,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 318 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 23:11:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 183. [2022-01-31 23:11:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 177 states have (on average 1.2485875706214689) internal successors, (221), 177 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 226 transitions. [2022-01-31 23:11:29,120 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 226 transitions. Word has length 174 [2022-01-31 23:11:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:29,121 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 226 transitions. [2022-01-31 23:11:29,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 43 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 226 transitions. [2022-01-31 23:11:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 23:11:29,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:29,121 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:29,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 23:11:29,122 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:29,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash 541975672, now seen corresponding path program 41 times [2022-01-31 23:11:29,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:29,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141864482] [2022-01-31 23:11:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:29,133 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:29,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:29,146 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:29,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:29,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141864482] [2022-01-31 23:11:29,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1141864482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:29,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:29,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 23:11:29,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826064284] [2022-01-31 23:11:29,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:29,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 23:11:29,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:29,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 23:11:29,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:11:29,940 INFO L87 Difference]: Start difference. First operand 183 states and 226 transitions. Second operand has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 44 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:30,388 INFO L93 Difference]: Finished difference Result 412 states and 543 transitions. [2022-01-31 23:11:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 23:11:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 44 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-01-31 23:11:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:30,393 INFO L225 Difference]: With dead ends: 412 [2022-01-31 23:11:30,393 INFO L226 Difference]: Without dead ends: 400 [2022-01-31 23:11:30,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=993, Invalid=1077, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 23:11:30,394 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 682 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:30,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 332 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-01-31 23:11:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 187. [2022-01-31 23:11:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.2486187845303867) internal successors, (226), 181 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 231 transitions. [2022-01-31 23:11:30,400 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 231 transitions. Word has length 178 [2022-01-31 23:11:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:30,400 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 231 transitions. [2022-01-31 23:11:30,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 44 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 231 transitions. [2022-01-31 23:11:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 23:11:30,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:30,401 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:30,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 23:11:30,401 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1152759843, now seen corresponding path program 42 times [2022-01-31 23:11:30,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:30,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846926730] [2022-01-31 23:11:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:30,405 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:30,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:30,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:31,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:31,195 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:31,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846926730] [2022-01-31 23:11:31,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1846926730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:31,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:31,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 23:11:31,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559730764] [2022-01-31 23:11:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:31,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 23:11:31,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 23:11:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 23:11:31,197 INFO L87 Difference]: Start difference. First operand 187 states and 231 transitions. Second operand has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 45 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:31,779 INFO L93 Difference]: Finished difference Result 421 states and 555 transitions. [2022-01-31 23:11:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 23:11:31,779 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 45 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-01-31 23:11:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:31,781 INFO L225 Difference]: With dead ends: 421 [2022-01-31 23:11:31,781 INFO L226 Difference]: Without dead ends: 409 [2022-01-31 23:11:31,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1038, Invalid=1124, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 23:11:31,782 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 834 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:31,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 316 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-31 23:11:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 191. [2022-01-31 23:11:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 185 states have (on average 1.2486486486486486) internal successors, (231), 185 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 236 transitions. [2022-01-31 23:11:31,789 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 236 transitions. Word has length 182 [2022-01-31 23:11:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:31,789 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 236 transitions. [2022-01-31 23:11:31,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 45 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 236 transitions. [2022-01-31 23:11:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 23:11:31,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:31,790 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:31,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 23:11:31,790 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash -252940094, now seen corresponding path program 43 times [2022-01-31 23:11:31,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:31,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876519874] [2022-01-31 23:11:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:31,797 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:31,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:31,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:32,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:32,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876519874] [2022-01-31 23:11:32,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876519874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:32,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:32,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 23:11:32,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231921223] [2022-01-31 23:11:32,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:32,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 23:11:32,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:32,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 23:11:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 23:11:32,638 INFO L87 Difference]: Start difference. First operand 191 states and 236 transitions. Second operand has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 46 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:33,132 INFO L93 Difference]: Finished difference Result 430 states and 567 transitions. [2022-01-31 23:11:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 23:11:33,133 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 46 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 23:11:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:33,134 INFO L225 Difference]: With dead ends: 430 [2022-01-31 23:11:33,134 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 23:11:33,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1084, Invalid=1172, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 23:11:33,135 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 790 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:33,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 334 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 23:11:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 195. [2022-01-31 23:11:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.2486772486772486) internal successors, (236), 189 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 241 transitions. [2022-01-31 23:11:33,143 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 241 transitions. Word has length 186 [2022-01-31 23:11:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:33,144 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 241 transitions. [2022-01-31 23:11:33,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 46 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 241 transitions. [2022-01-31 23:11:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 23:11:33,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:33,144 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:33,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 23:11:33,145 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash -975855833, now seen corresponding path program 44 times [2022-01-31 23:11:33,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:33,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459085942] [2022-01-31 23:11:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:33,155 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:33,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:33,168 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:34,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:34,029 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 23:11:34,029 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:34,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459085942] [2022-01-31 23:11:34,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [459085942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:34,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:34,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 23:11:34,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384978565] [2022-01-31 23:11:34,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:34,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 23:11:34,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:34,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 23:11:34,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 23:11:34,031 INFO L87 Difference]: Start difference. First operand 195 states and 241 transitions. Second operand has 48 states, 48 states have (on average 3.875) internal successors, (186), 47 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:34,526 INFO L93 Difference]: Finished difference Result 439 states and 579 transitions. [2022-01-31 23:11:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 23:11:34,527 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.875) internal successors, (186), 47 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 23:11:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:34,528 INFO L225 Difference]: With dead ends: 439 [2022-01-31 23:11:34,528 INFO L226 Difference]: Without dead ends: 427 [2022-01-31 23:11:34,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1131, Invalid=1221, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 23:11:34,529 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 771 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:34,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 341 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-31 23:11:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 199. [2022-01-31 23:11:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.2487046632124352) internal successors, (241), 193 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 246 transitions. [2022-01-31 23:11:34,535 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 246 transitions. Word has length 190 [2022-01-31 23:11:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:34,535 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 246 transitions. [2022-01-31 23:11:34,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.875) internal successors, (186), 47 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 246 transitions. [2022-01-31 23:11:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 23:11:34,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:34,536 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:34,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 23:11:34,536 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:34,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1945693428, now seen corresponding path program 45 times [2022-01-31 23:11:34,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:34,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565133740] [2022-01-31 23:11:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:34,542 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:34,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:34,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:35,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:35,430 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:35,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565133740] [2022-01-31 23:11:35,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1565133740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:35,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:35,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 23:11:35,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347845879] [2022-01-31 23:11:35,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:35,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 23:11:35,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:35,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 23:11:35,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 23:11:35,431 INFO L87 Difference]: Start difference. First operand 199 states and 246 transitions. Second operand has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:35,917 INFO L93 Difference]: Finished difference Result 448 states and 591 transitions. [2022-01-31 23:11:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 23:11:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-01-31 23:11:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:35,919 INFO L225 Difference]: With dead ends: 448 [2022-01-31 23:11:35,920 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 23:11:35,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 23:11:35,920 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 895 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:35,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 330 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 23:11:35,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 203. [2022-01-31 23:11:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.248730964467005) internal successors, (246), 197 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 251 transitions. [2022-01-31 23:11:35,929 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 251 transitions. Word has length 194 [2022-01-31 23:11:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:35,929 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 251 transitions. [2022-01-31 23:11:35,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 251 transitions. [2022-01-31 23:11:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 23:11:35,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:35,930 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:35,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 23:11:35,931 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:35,931 INFO L85 PathProgramCache]: Analyzing trace with hash 853675121, now seen corresponding path program 46 times [2022-01-31 23:11:35,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:35,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842234644] [2022-01-31 23:11:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:35,935 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:35,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:35,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:36,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:36,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:36,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842234644] [2022-01-31 23:11:36,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [842234644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:36,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:36,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 23:11:36,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407333077] [2022-01-31 23:11:36,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:36,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 23:11:36,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 23:11:36,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 23:11:36,848 INFO L87 Difference]: Start difference. First operand 203 states and 251 transitions. Second operand has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:37,392 INFO L93 Difference]: Finished difference Result 457 states and 603 transitions. [2022-01-31 23:11:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 23:11:37,392 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2022-01-31 23:11:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:37,394 INFO L225 Difference]: With dead ends: 457 [2022-01-31 23:11:37,394 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 23:11:37,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 23:11:37,394 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 853 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:37,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 344 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 23:11:37,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 207. [2022-01-31 23:11:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 201 states have (on average 1.2487562189054726) internal successors, (251), 201 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 256 transitions. [2022-01-31 23:11:37,400 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 256 transitions. Word has length 198 [2022-01-31 23:11:37,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:37,400 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 256 transitions. [2022-01-31 23:11:37,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 256 transitions. [2022-01-31 23:11:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 23:11:37,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:37,401 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:37,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 23:11:37,401 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:37,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1758999722, now seen corresponding path program 47 times [2022-01-31 23:11:37,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:37,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960578069] [2022-01-31 23:11:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:37,405 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:37,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:37,420 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:38,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:38,315 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:38,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960578069] [2022-01-31 23:11:38,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [960578069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:38,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:38,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 23:11:38,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644097832] [2022-01-31 23:11:38,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:38,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 23:11:38,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:38,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 23:11:38,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 23:11:38,317 INFO L87 Difference]: Start difference. First operand 207 states and 256 transitions. Second operand has 51 states, 51 states have (on average 3.8823529411764706) internal successors, (198), 50 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:38,901 INFO L93 Difference]: Finished difference Result 466 states and 615 transitions. [2022-01-31 23:11:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 23:11:38,901 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.8823529411764706) internal successors, (198), 50 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-01-31 23:11:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:38,903 INFO L225 Difference]: With dead ends: 466 [2022-01-31 23:11:38,903 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 23:11:38,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1278, Invalid=1374, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 23:11:38,904 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 846 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:38,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 357 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 23:11:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 211. [2022-01-31 23:11:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 205 states have (on average 1.248780487804878) internal successors, (256), 205 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 261 transitions. [2022-01-31 23:11:38,911 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 261 transitions. Word has length 202 [2022-01-31 23:11:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:38,911 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 261 transitions. [2022-01-31 23:11:38,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.8823529411764706) internal successors, (198), 50 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 261 transitions. [2022-01-31 23:11:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 23:11:38,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:38,912 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:38,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 23:11:38,912 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:38,912 INFO L85 PathProgramCache]: Analyzing trace with hash -755396677, now seen corresponding path program 48 times [2022-01-31 23:11:38,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:38,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707481556] [2022-01-31 23:11:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:38,917 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:38,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:38,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:39,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:39,920 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:39,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707481556] [2022-01-31 23:11:39,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [707481556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:39,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:39,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 23:11:39,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347745292] [2022-01-31 23:11:39,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:39,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 23:11:39,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:39,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 23:11:39,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 23:11:39,922 INFO L87 Difference]: Start difference. First operand 211 states and 261 transitions. Second operand has 52 states, 52 states have (on average 3.8846153846153846) internal successors, (202), 51 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:40,487 INFO L93 Difference]: Finished difference Result 475 states and 627 transitions. [2022-01-31 23:11:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 23:11:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8846153846153846) internal successors, (202), 51 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-01-31 23:11:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:40,490 INFO L225 Difference]: With dead ends: 475 [2022-01-31 23:11:40,490 INFO L226 Difference]: Without dead ends: 463 [2022-01-31 23:11:40,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1329, Invalid=1427, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 23:11:40,490 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 996 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:40,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 352 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-31 23:11:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 215. [2022-01-31 23:11:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 209 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 266 transitions. [2022-01-31 23:11:40,498 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 266 transitions. Word has length 206 [2022-01-31 23:11:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:40,498 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 266 transitions. [2022-01-31 23:11:40,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8846153846153846) internal successors, (202), 51 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 266 transitions. [2022-01-31 23:11:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 23:11:40,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:40,499 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:40,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 23:11:40,499 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:40,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1915184736, now seen corresponding path program 49 times [2022-01-31 23:11:40,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:40,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681271532] [2022-01-31 23:11:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:40,504 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:40,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:40,523 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:41,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:41,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681271532] [2022-01-31 23:11:41,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1681271532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:41,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:41,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 23:11:41,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980360065] [2022-01-31 23:11:41,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:41,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 23:11:41,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:41,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 23:11:41,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 23:11:41,544 INFO L87 Difference]: Start difference. First operand 215 states and 266 transitions. Second operand has 53 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:42,094 INFO L93 Difference]: Finished difference Result 484 states and 639 transitions. [2022-01-31 23:11:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 23:11:42,094 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-01-31 23:11:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:42,096 INFO L225 Difference]: With dead ends: 484 [2022-01-31 23:11:42,096 INFO L226 Difference]: Without dead ends: 472 [2022-01-31 23:11:42,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 23:11:42,097 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 948 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:42,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 366 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-31 23:11:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 219. [2022-01-31 23:11:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 213 states have (on average 1.2488262910798122) internal successors, (266), 213 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 271 transitions. [2022-01-31 23:11:42,105 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 271 transitions. Word has length 210 [2022-01-31 23:11:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:42,106 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 271 transitions. [2022-01-31 23:11:42,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:42,106 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 271 transitions. [2022-01-31 23:11:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 23:11:42,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:42,107 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:42,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 23:11:42,107 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:42,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1285957893, now seen corresponding path program 50 times [2022-01-31 23:11:42,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:42,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174596370] [2022-01-31 23:11:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:42,112 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:42,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:42,131 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:43,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:43,123 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:43,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174596370] [2022-01-31 23:11:43,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174596370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:43,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:43,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 23:11:43,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304531699] [2022-01-31 23:11:43,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:43,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 23:11:43,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:43,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 23:11:43,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 23:11:43,125 INFO L87 Difference]: Start difference. First operand 219 states and 271 transitions. Second operand has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 53 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:43,742 INFO L93 Difference]: Finished difference Result 493 states and 651 transitions. [2022-01-31 23:11:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 23:11:43,743 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 53 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-01-31 23:11:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:43,751 INFO L225 Difference]: With dead ends: 493 [2022-01-31 23:11:43,751 INFO L226 Difference]: Without dead ends: 481 [2022-01-31 23:11:43,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1434, Invalid=1536, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 23:11:43,752 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 818 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:43,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 388 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-31 23:11:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 223. [2022-01-31 23:11:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.2488479262672811) internal successors, (271), 217 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 276 transitions. [2022-01-31 23:11:43,758 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 276 transitions. Word has length 214 [2022-01-31 23:11:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:43,758 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 276 transitions. [2022-01-31 23:11:43,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 53 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 276 transitions. [2022-01-31 23:11:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 23:11:43,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:43,759 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:43,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 23:11:43,759 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:43,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1046250006, now seen corresponding path program 51 times [2022-01-31 23:11:43,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:43,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746200090] [2022-01-31 23:11:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:43,765 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:43,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:43,782 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:44,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:44,865 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746200090] [2022-01-31 23:11:44,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1746200090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:44,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:44,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 23:11:44,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068498319] [2022-01-31 23:11:44,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:44,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 23:11:44,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 23:11:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 23:11:44,866 INFO L87 Difference]: Start difference. First operand 223 states and 276 transitions. Second operand has 55 states, 55 states have (on average 3.890909090909091) internal successors, (214), 54 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:45,484 INFO L93 Difference]: Finished difference Result 502 states and 663 transitions. [2022-01-31 23:11:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 23:11:45,484 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.890909090909091) internal successors, (214), 54 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2022-01-31 23:11:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:45,486 INFO L225 Difference]: With dead ends: 502 [2022-01-31 23:11:45,486 INFO L226 Difference]: Without dead ends: 490 [2022-01-31 23:11:45,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1488, Invalid=1592, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 23:11:45,487 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 901 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:45,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [953 Valid, 392 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-31 23:11:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 227. [2022-01-31 23:11:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.248868778280543) internal successors, (276), 221 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 281 transitions. [2022-01-31 23:11:45,493 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 281 transitions. Word has length 218 [2022-01-31 23:11:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:45,493 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 281 transitions. [2022-01-31 23:11:45,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.890909090909091) internal successors, (214), 54 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 281 transitions. [2022-01-31 23:11:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 23:11:45,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:45,494 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:45,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 23:11:45,495 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash 477222991, now seen corresponding path program 52 times [2022-01-31 23:11:45,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:45,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934924611] [2022-01-31 23:11:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:45,503 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:45,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:45,521 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:46,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:46,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:46,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934924611] [2022-01-31 23:11:46,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [934924611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:46,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:46,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 23:11:46,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124069056] [2022-01-31 23:11:46,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:46,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 23:11:46,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:46,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 23:11:46,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 23:11:46,603 INFO L87 Difference]: Start difference. First operand 227 states and 281 transitions. Second operand has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 55 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:47,215 INFO L93 Difference]: Finished difference Result 511 states and 675 transitions. [2022-01-31 23:11:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 23:11:47,216 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 55 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2022-01-31 23:11:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:47,218 INFO L225 Difference]: With dead ends: 511 [2022-01-31 23:11:47,218 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 23:11:47,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1543, Invalid=1649, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 23:11:47,219 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 962 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:47,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 394 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 23:11:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 231. [2022-01-31 23:11:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 225 states have (on average 1.248888888888889) internal successors, (281), 225 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 286 transitions. [2022-01-31 23:11:47,224 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 286 transitions. Word has length 222 [2022-01-31 23:11:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:47,225 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 286 transitions. [2022-01-31 23:11:47,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 55 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 286 transitions. [2022-01-31 23:11:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 23:11:47,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:47,226 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:47,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 23:11:47,226 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:47,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1511159860, now seen corresponding path program 53 times [2022-01-31 23:11:47,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:47,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369759974] [2022-01-31 23:11:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:47,230 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:47,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:47,247 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:48,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:48,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:48,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369759974] [2022-01-31 23:11:48,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [369759974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:48,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:48,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 23:11:48,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746643183] [2022-01-31 23:11:48,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:48,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 23:11:48,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:48,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 23:11:48,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 23:11:48,394 INFO L87 Difference]: Start difference. First operand 231 states and 286 transitions. Second operand has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 56 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:49,050 INFO L93 Difference]: Finished difference Result 520 states and 687 transitions. [2022-01-31 23:11:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 23:11:49,050 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 56 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2022-01-31 23:11:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:49,052 INFO L225 Difference]: With dead ends: 520 [2022-01-31 23:11:49,052 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 23:11:49,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1599, Invalid=1707, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 23:11:49,053 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 1212 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:49,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 393 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 23:11:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 235. [2022-01-31 23:11:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 229 states have (on average 1.2489082969432315) internal successors, (286), 229 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 291 transitions. [2022-01-31 23:11:49,059 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 291 transitions. Word has length 226 [2022-01-31 23:11:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:49,060 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 291 transitions. [2022-01-31 23:11:49,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 56 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 291 transitions. [2022-01-31 23:11:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 23:11:49,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:49,061 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:49,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 23:11:49,061 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1796825703, now seen corresponding path program 54 times [2022-01-31 23:11:49,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:49,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646577285] [2022-01-31 23:11:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:49,065 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:49,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:49,084 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:50,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:50,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646577285] [2022-01-31 23:11:50,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [646577285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:50,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:50,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 23:11:50,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058410886] [2022-01-31 23:11:50,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:50,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 23:11:50,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:50,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 23:11:50,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 23:11:50,250 INFO L87 Difference]: Start difference. First operand 235 states and 291 transitions. Second operand has 58 states, 58 states have (on average 3.896551724137931) internal successors, (226), 57 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:50,905 INFO L93 Difference]: Finished difference Result 529 states and 699 transitions. [2022-01-31 23:11:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 23:11:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.896551724137931) internal successors, (226), 57 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-01-31 23:11:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:50,914 INFO L225 Difference]: With dead ends: 529 [2022-01-31 23:11:50,914 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 23:11:50,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1656, Invalid=1766, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 23:11:50,915 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 873 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:50,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 407 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 23:11:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 239. [2022-01-31 23:11:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 233 states have (on average 1.2489270386266094) internal successors, (291), 233 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-01-31 23:11:50,921 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 230 [2022-01-31 23:11:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:50,921 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-01-31 23:11:50,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.896551724137931) internal successors, (226), 57 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-01-31 23:11:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 23:11:50,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:50,922 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:50,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 23:11:50,922 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1420789886, now seen corresponding path program 55 times [2022-01-31 23:11:50,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:50,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479594024] [2022-01-31 23:11:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:50,938 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:50,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:50,960 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:52,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:52,152 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 23:11:52,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479594024] [2022-01-31 23:11:52,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479594024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:52,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:52,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 23:11:52,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600190305] [2022-01-31 23:11:52,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:52,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 23:11:52,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:52,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 23:11:52,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 23:11:52,154 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 58 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:52,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:52,854 INFO L93 Difference]: Finished difference Result 538 states and 711 transitions. [2022-01-31 23:11:52,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 23:11:52,855 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 58 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-01-31 23:11:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:52,856 INFO L225 Difference]: With dead ends: 538 [2022-01-31 23:11:52,856 INFO L226 Difference]: Without dead ends: 526 [2022-01-31 23:11:52,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1714, Invalid=1826, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 23:11:52,857 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 953 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:52,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 421 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-31 23:11:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 243. [2022-01-31 23:11:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 237 states have (on average 1.248945147679325) internal successors, (296), 237 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 301 transitions. [2022-01-31 23:11:52,863 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 301 transitions. Word has length 234 [2022-01-31 23:11:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:52,863 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 301 transitions. [2022-01-31 23:11:52,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 58 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 301 transitions. [2022-01-31 23:11:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-31 23:11:52,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:52,864 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:52,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 23:11:52,864 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash -561088285, now seen corresponding path program 56 times [2022-01-31 23:11:52,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241009445] [2022-01-31 23:11:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:52,869 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:52,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:52,890 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:54,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:54,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:54,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241009445] [2022-01-31 23:11:54,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [241009445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:54,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:54,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 23:11:54,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171352226] [2022-01-31 23:11:54,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:54,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 23:11:54,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 23:11:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 23:11:54,127 INFO L87 Difference]: Start difference. First operand 243 states and 301 transitions. Second operand has 60 states, 60 states have (on average 3.9) internal successors, (234), 59 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:54,802 INFO L93 Difference]: Finished difference Result 547 states and 723 transitions. [2022-01-31 23:11:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 23:11:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.9) internal successors, (234), 59 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2022-01-31 23:11:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:54,805 INFO L225 Difference]: With dead ends: 547 [2022-01-31 23:11:54,805 INFO L226 Difference]: Without dead ends: 535 [2022-01-31 23:11:54,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1773, Invalid=1887, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 23:11:54,805 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1010 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:54,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 418 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:11:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-31 23:11:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 247. [2022-01-31 23:11:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 241 states have (on average 1.2489626556016598) internal successors, (301), 241 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 306 transitions. [2022-01-31 23:11:54,811 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 306 transitions. Word has length 238 [2022-01-31 23:11:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:54,812 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 306 transitions. [2022-01-31 23:11:54,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.9) internal successors, (234), 59 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 306 transitions. [2022-01-31 23:11:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 23:11:54,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:54,813 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:54,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 23:11:54,813 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:54,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2063290680, now seen corresponding path program 57 times [2022-01-31 23:11:54,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:54,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923526244] [2022-01-31 23:11:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:54,817 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:54,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:54,840 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:56,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:56,068 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 23:11:56,068 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:56,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923526244] [2022-01-31 23:11:56,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1923526244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:56,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:56,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 23:11:56,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214925056] [2022-01-31 23:11:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:56,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 23:11:56,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 23:11:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 23:11:56,070 INFO L87 Difference]: Start difference. First operand 247 states and 306 transitions. Second operand has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 60 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:56,789 INFO L93 Difference]: Finished difference Result 556 states and 735 transitions. [2022-01-31 23:11:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 23:11:56,790 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 60 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2022-01-31 23:11:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:56,791 INFO L225 Difference]: With dead ends: 556 [2022-01-31 23:11:56,791 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 23:11:56,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1833, Invalid=1949, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 23:11:56,792 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1026 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:56,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 418 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 23:11:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 251. [2022-01-31 23:11:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.2489795918367348) internal successors, (306), 245 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 311 transitions. [2022-01-31 23:11:56,799 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 311 transitions. Word has length 242 [2022-01-31 23:11:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:56,799 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 311 transitions. [2022-01-31 23:11:56,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 60 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 311 transitions. [2022-01-31 23:11:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 23:11:56,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:56,800 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:56,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 23:11:56,800 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:56,800 INFO L85 PathProgramCache]: Analyzing trace with hash -135042515, now seen corresponding path program 58 times [2022-01-31 23:11:56,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:56,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243626257] [2022-01-31 23:11:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:56,804 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:56,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:56,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:58,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:58,095 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:58,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243626257] [2022-01-31 23:11:58,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243626257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:58,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:58,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 23:11:58,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132910023] [2022-01-31 23:11:58,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:58,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 23:11:58,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 23:11:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 23:11:58,097 INFO L87 Difference]: Start difference. First operand 251 states and 311 transitions. Second operand has 62 states, 62 states have (on average 3.903225806451613) internal successors, (242), 61 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:58,849 INFO L93 Difference]: Finished difference Result 565 states and 747 transitions. [2022-01-31 23:11:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 23:11:58,849 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.903225806451613) internal successors, (242), 61 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2022-01-31 23:11:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:58,851 INFO L225 Difference]: With dead ends: 565 [2022-01-31 23:11:58,851 INFO L226 Difference]: Without dead ends: 553 [2022-01-31 23:11:58,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1894, Invalid=2012, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 23:11:58,852 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1126 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:58,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 436 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:11:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-31 23:11:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 255. [2022-01-31 23:11:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 249 states have (on average 1.248995983935743) internal successors, (311), 249 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 316 transitions. [2022-01-31 23:11:58,858 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 316 transitions. Word has length 246 [2022-01-31 23:11:58,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:58,858 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 316 transitions. [2022-01-31 23:11:58,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.903225806451613) internal successors, (242), 61 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 316 transitions. [2022-01-31 23:11:58,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 23:11:58,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:58,859 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:58,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 23:11:58,860 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:58,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:58,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1801721070, now seen corresponding path program 59 times [2022-01-31 23:11:58,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:58,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772492678] [2022-01-31 23:11:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:58,872 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:58,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:58,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:00,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:00,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:00,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772492678] [2022-01-31 23:12:00,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [772492678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:00,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:00,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 23:12:00,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92694872] [2022-01-31 23:12:00,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:00,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 23:12:00,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 23:12:00,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 23:12:00,216 INFO L87 Difference]: Start difference. First operand 255 states and 316 transitions. Second operand has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 62 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:00,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:00,994 INFO L93 Difference]: Finished difference Result 574 states and 759 transitions. [2022-01-31 23:12:00,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 23:12:00,995 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 62 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2022-01-31 23:12:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:00,997 INFO L225 Difference]: With dead ends: 574 [2022-01-31 23:12:00,997 INFO L226 Difference]: Without dead ends: 562 [2022-01-31 23:12:00,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1956, Invalid=2076, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 23:12:00,997 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1106 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:00,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1166 Valid, 431 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-31 23:12:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 259. [2022-01-31 23:12:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 253 states have (on average 1.2490118577075098) internal successors, (316), 253 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 321 transitions. [2022-01-31 23:12:01,004 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 321 transitions. Word has length 250 [2022-01-31 23:12:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:01,004 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 321 transitions. [2022-01-31 23:12:01,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 62 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 321 transitions. [2022-01-31 23:12:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 23:12:01,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:01,005 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:01,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 23:12:01,005 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:01,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1247841929, now seen corresponding path program 60 times [2022-01-31 23:12:01,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:01,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9699610] [2022-01-31 23:12:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:01,017 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:01,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:01,042 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:02,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:02,414 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:02,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9699610] [2022-01-31 23:12:02,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [9699610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:02,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:02,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 23:12:02,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211048956] [2022-01-31 23:12:02,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:02,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 23:12:02,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:02,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 23:12:02,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 23:12:02,415 INFO L87 Difference]: Start difference. First operand 259 states and 321 transitions. Second operand has 64 states, 64 states have (on average 3.90625) internal successors, (250), 63 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:03,215 INFO L93 Difference]: Finished difference Result 583 states and 771 transitions. [2022-01-31 23:12:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 23:12:03,215 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.90625) internal successors, (250), 63 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-01-31 23:12:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:03,217 INFO L225 Difference]: With dead ends: 583 [2022-01-31 23:12:03,217 INFO L226 Difference]: Without dead ends: 571 [2022-01-31 23:12:03,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2019, Invalid=2141, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 23:12:03,218 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1149 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:03,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 457 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-31 23:12:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 263. [2022-01-31 23:12:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 257 states have (on average 1.2490272373540856) internal successors, (321), 257 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 326 transitions. [2022-01-31 23:12:03,225 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 326 transitions. Word has length 254 [2022-01-31 23:12:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:03,225 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 326 transitions. [2022-01-31 23:12:03,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.90625) internal successors, (250), 63 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 326 transitions. [2022-01-31 23:12:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 23:12:03,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:03,226 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:03,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 23:12:03,226 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:03,227 INFO L85 PathProgramCache]: Analyzing trace with hash 50281820, now seen corresponding path program 61 times [2022-01-31 23:12:03,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:03,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264912032] [2022-01-31 23:12:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:03,232 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:03,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:03,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:04,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:04,674 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:04,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264912032] [2022-01-31 23:12:04,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [264912032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:04,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:04,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 23:12:04,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524170133] [2022-01-31 23:12:04,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:04,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 23:12:04,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:04,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 23:12:04,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 23:12:04,676 INFO L87 Difference]: Start difference. First operand 263 states and 326 transitions. Second operand has 65 states, 65 states have (on average 3.9076923076923076) internal successors, (254), 64 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:05,483 INFO L93 Difference]: Finished difference Result 592 states and 783 transitions. [2022-01-31 23:12:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 23:12:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.9076923076923076) internal successors, (254), 64 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2022-01-31 23:12:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:05,485 INFO L225 Difference]: With dead ends: 592 [2022-01-31 23:12:05,485 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 23:12:05,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 23:12:05,486 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1091 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:05,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 469 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 23:12:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 267. [2022-01-31 23:12:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 261 states have (on average 1.2490421455938698) internal successors, (326), 261 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 331 transitions. [2022-01-31 23:12:05,493 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 331 transitions. Word has length 258 [2022-01-31 23:12:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:05,493 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 331 transitions. [2022-01-31 23:12:05,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.9076923076923076) internal successors, (254), 64 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 331 transitions. [2022-01-31 23:12:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 23:12:05,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:05,494 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:05,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 23:12:05,494 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:05,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1038315839, now seen corresponding path program 62 times [2022-01-31 23:12:05,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:05,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595938910] [2022-01-31 23:12:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:05,501 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:05,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:05,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:07,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:07,033 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:07,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595938910] [2022-01-31 23:12:07,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1595938910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:07,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:07,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 23:12:07,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919943446] [2022-01-31 23:12:07,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:07,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 23:12:07,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 23:12:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 23:12:07,035 INFO L87 Difference]: Start difference. First operand 267 states and 331 transitions. Second operand has 66 states, 66 states have (on average 3.909090909090909) internal successors, (258), 65 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:07,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:07,880 INFO L93 Difference]: Finished difference Result 601 states and 795 transitions. [2022-01-31 23:12:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 23:12:07,881 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.909090909090909) internal successors, (258), 65 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-01-31 23:12:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:07,883 INFO L225 Difference]: With dead ends: 601 [2022-01-31 23:12:07,883 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 23:12:07,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2148, Invalid=2274, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 23:12:07,884 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1121 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:07,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 461 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 23:12:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 271. [2022-01-31 23:12:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 265 states have (on average 1.2490566037735849) internal successors, (331), 265 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 336 transitions. [2022-01-31 23:12:07,926 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 336 transitions. Word has length 262 [2022-01-31 23:12:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:07,927 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 336 transitions. [2022-01-31 23:12:07,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.909090909090909) internal successors, (258), 65 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 336 transitions. [2022-01-31 23:12:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 23:12:07,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:07,928 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:07,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 23:12:07,928 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash 632858022, now seen corresponding path program 63 times [2022-01-31 23:12:07,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:07,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388877038] [2022-01-31 23:12:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:07,935 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:07,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:07,958 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:09,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:09,416 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:09,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388877038] [2022-01-31 23:12:09,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [388877038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:09,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:09,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 23:12:09,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917947020] [2022-01-31 23:12:09,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:09,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 23:12:09,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:09,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 23:12:09,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 23:12:09,418 INFO L87 Difference]: Start difference. First operand 271 states and 336 transitions. Second operand has 67 states, 67 states have (on average 3.91044776119403) internal successors, (262), 66 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:10,309 INFO L93 Difference]: Finished difference Result 610 states and 807 transitions. [2022-01-31 23:12:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 23:12:10,310 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.91044776119403) internal successors, (262), 66 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2022-01-31 23:12:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:10,312 INFO L225 Difference]: With dead ends: 610 [2022-01-31 23:12:10,312 INFO L226 Difference]: Without dead ends: 598 [2022-01-31 23:12:10,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2214, Invalid=2342, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 23:12:10,312 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1177 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:10,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 466 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-31 23:12:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 275. [2022-01-31 23:12:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 269 states have (on average 1.2490706319702602) internal successors, (336), 269 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 341 transitions. [2022-01-31 23:12:10,319 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 341 transitions. Word has length 266 [2022-01-31 23:12:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:10,319 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 341 transitions. [2022-01-31 23:12:10,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.91044776119403) internal successors, (262), 66 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 341 transitions. [2022-01-31 23:12:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 23:12:10,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:10,320 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:10,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 23:12:10,320 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:10,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1644903925, now seen corresponding path program 64 times [2022-01-31 23:12:10,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:10,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811447041] [2022-01-31 23:12:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:10,325 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:10,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:10,350 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:11,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:11,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:11,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811447041] [2022-01-31 23:12:11,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811447041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:11,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:11,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 23:12:11,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563510973] [2022-01-31 23:12:11,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:11,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 23:12:11,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 23:12:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 23:12:11,863 INFO L87 Difference]: Start difference. First operand 275 states and 341 transitions. Second operand has 68 states, 68 states have (on average 3.911764705882353) internal successors, (266), 67 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:12,841 INFO L93 Difference]: Finished difference Result 619 states and 819 transitions. [2022-01-31 23:12:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 23:12:12,841 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.911764705882353) internal successors, (266), 67 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-01-31 23:12:12,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:12,843 INFO L225 Difference]: With dead ends: 619 [2022-01-31 23:12:12,843 INFO L226 Difference]: Without dead ends: 607 [2022-01-31 23:12:12,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2281, Invalid=2411, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 23:12:12,844 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1393 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:12,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 460 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:12,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-31 23:12:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 279. [2022-01-31 23:12:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 273 states have (on average 1.249084249084249) internal successors, (341), 273 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 346 transitions. [2022-01-31 23:12:12,851 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 346 transitions. Word has length 270 [2022-01-31 23:12:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:12,851 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 346 transitions. [2022-01-31 23:12:12,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.911764705882353) internal successors, (266), 67 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 346 transitions. [2022-01-31 23:12:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-31 23:12:12,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:12,852 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:12,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 23:12:12,852 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash 676471792, now seen corresponding path program 65 times [2022-01-31 23:12:12,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:12,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453124385] [2022-01-31 23:12:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:12,859 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:12,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:12,889 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:14,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:14,500 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 23:12:14,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:14,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453124385] [2022-01-31 23:12:14,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453124385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:14,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:14,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 23:12:14,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341064208] [2022-01-31 23:12:14,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:14,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 23:12:14,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:14,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 23:12:14,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 23:12:14,502 INFO L87 Difference]: Start difference. First operand 279 states and 346 transitions. Second operand has 69 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 68 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:15,456 INFO L93 Difference]: Finished difference Result 628 states and 831 transitions. [2022-01-31 23:12:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 23:12:15,456 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 68 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2022-01-31 23:12:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:15,458 INFO L225 Difference]: With dead ends: 628 [2022-01-31 23:12:15,458 INFO L226 Difference]: Without dead ends: 616 [2022-01-31 23:12:15,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2349, Invalid=2481, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 23:12:15,459 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1566 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:15,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1632 Valid, 477 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-31 23:12:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 283. [2022-01-31 23:12:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 277 states have (on average 1.2490974729241877) internal successors, (346), 277 states have internal predecessors, (346), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 351 transitions. [2022-01-31 23:12:15,466 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 351 transitions. Word has length 274 [2022-01-31 23:12:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:15,466 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 351 transitions. [2022-01-31 23:12:15,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 68 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 351 transitions. [2022-01-31 23:12:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 23:12:15,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:15,467 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:15,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 23:12:15,468 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1615721643, now seen corresponding path program 66 times [2022-01-31 23:12:15,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:15,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645876364] [2022-01-31 23:12:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:15,473 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:15,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:15,538 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:17,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:17,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:17,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645876364] [2022-01-31 23:12:17,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645876364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:17,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:17,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 23:12:17,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989415920] [2022-01-31 23:12:17,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:17,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 23:12:17,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:17,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 23:12:17,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 23:12:17,250 INFO L87 Difference]: Start difference. First operand 283 states and 351 transitions. Second operand has 70 states, 70 states have (on average 3.914285714285714) internal successors, (274), 69 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:18,240 INFO L93 Difference]: Finished difference Result 637 states and 843 transitions. [2022-01-31 23:12:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 23:12:18,240 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.914285714285714) internal successors, (274), 69 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2022-01-31 23:12:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:18,242 INFO L225 Difference]: With dead ends: 637 [2022-01-31 23:12:18,242 INFO L226 Difference]: Without dead ends: 625 [2022-01-31 23:12:18,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2418, Invalid=2552, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 23:12:18,243 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1183 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:18,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 497 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-31 23:12:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 287. [2022-01-31 23:12:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 281 states have (on average 1.2491103202846976) internal successors, (351), 281 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 356 transitions. [2022-01-31 23:12:18,252 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 356 transitions. Word has length 278 [2022-01-31 23:12:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:18,252 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 356 transitions. [2022-01-31 23:12:18,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.914285714285714) internal successors, (274), 69 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 356 transitions. [2022-01-31 23:12:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-01-31 23:12:18,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:18,254 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:18,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 23:12:18,254 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:18,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:18,254 INFO L85 PathProgramCache]: Analyzing trace with hash 206944314, now seen corresponding path program 67 times [2022-01-31 23:12:18,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:18,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093186409] [2022-01-31 23:12:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:18,259 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:18,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:18,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:19,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:19,908 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:19,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093186409] [2022-01-31 23:12:19,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1093186409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:19,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:19,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 23:12:19,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935002332] [2022-01-31 23:12:19,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:19,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 23:12:19,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 23:12:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 23:12:19,911 INFO L87 Difference]: Start difference. First operand 287 states and 356 transitions. Second operand has 71 states, 71 states have (on average 3.915492957746479) internal successors, (278), 70 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:20,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:20,903 INFO L93 Difference]: Finished difference Result 646 states and 855 transitions. [2022-01-31 23:12:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 23:12:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.915492957746479) internal successors, (278), 70 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 282 [2022-01-31 23:12:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:20,906 INFO L225 Difference]: With dead ends: 646 [2022-01-31 23:12:20,906 INFO L226 Difference]: Without dead ends: 634 [2022-01-31 23:12:20,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2488, Invalid=2624, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 23:12:20,906 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1396 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:20,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 491 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-31 23:12:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 291. [2022-01-31 23:12:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 285 states have (on average 1.249122807017544) internal successors, (356), 285 states have internal predecessors, (356), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 361 transitions. [2022-01-31 23:12:20,914 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 361 transitions. Word has length 282 [2022-01-31 23:12:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:20,914 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 361 transitions. [2022-01-31 23:12:20,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.915492957746479) internal successors, (278), 70 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 361 transitions. [2022-01-31 23:12:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 23:12:20,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:20,915 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:20,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 23:12:20,915 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:20,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash -203527521, now seen corresponding path program 68 times [2022-01-31 23:12:20,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:20,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745109361] [2022-01-31 23:12:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:20,919 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:20,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:20,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:22,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:22,718 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:22,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745109361] [2022-01-31 23:12:22,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [745109361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:22,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:22,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 23:12:22,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800588447] [2022-01-31 23:12:22,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:22,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 23:12:22,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 23:12:22,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 23:12:22,720 INFO L87 Difference]: Start difference. First operand 291 states and 361 transitions. Second operand has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 71 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:23,695 INFO L93 Difference]: Finished difference Result 655 states and 867 transitions. [2022-01-31 23:12:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 23:12:23,696 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 71 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-01-31 23:12:23,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:23,698 INFO L225 Difference]: With dead ends: 655 [2022-01-31 23:12:23,698 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 23:12:23,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2559, Invalid=2697, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 23:12:23,698 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1215 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:23,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 492 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 23:12:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 295. [2022-01-31 23:12:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.2491349480968859) internal successors, (361), 289 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 366 transitions. [2022-01-31 23:12:23,705 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 366 transitions. Word has length 286 [2022-01-31 23:12:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:23,706 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 366 transitions. [2022-01-31 23:12:23,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 71 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 366 transitions. [2022-01-31 23:12:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 23:12:23,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:23,707 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:23,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 23:12:23,707 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:23,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1454546300, now seen corresponding path program 69 times [2022-01-31 23:12:23,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:23,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505818867] [2022-01-31 23:12:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:23,710 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:23,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:23,741 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:25,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:25,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:25,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505818867] [2022-01-31 23:12:25,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [505818867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:25,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:25,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 23:12:25,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501414397] [2022-01-31 23:12:25,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:25,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 23:12:25,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 23:12:25,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 23:12:25,497 INFO L87 Difference]: Start difference. First operand 295 states and 366 transitions. Second operand has 73 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 72 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:26,570 INFO L93 Difference]: Finished difference Result 664 states and 879 transitions. [2022-01-31 23:12:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 23:12:26,571 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 72 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2022-01-31 23:12:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:26,573 INFO L225 Difference]: With dead ends: 664 [2022-01-31 23:12:26,573 INFO L226 Difference]: Without dead ends: 652 [2022-01-31 23:12:26,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2631, Invalid=2771, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 23:12:26,574 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1395 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:26,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 511 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-31 23:12:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 299. [2022-01-31 23:12:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 293 states have (on average 1.2491467576791808) internal successors, (366), 293 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 371 transitions. [2022-01-31 23:12:26,582 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 371 transitions. Word has length 290 [2022-01-31 23:12:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:26,582 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 371 transitions. [2022-01-31 23:12:26,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 72 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 371 transitions. [2022-01-31 23:12:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-31 23:12:26,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:26,583 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:26,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 23:12:26,584 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:26,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1660690455, now seen corresponding path program 70 times [2022-01-31 23:12:26,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:26,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114176156] [2022-01-31 23:12:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:26,588 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:26,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:26,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:28,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:28,359 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 23:12:28,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:28,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114176156] [2022-01-31 23:12:28,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114176156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:28,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:28,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 23:12:28,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699666092] [2022-01-31 23:12:28,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:28,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 23:12:28,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 23:12:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 23:12:28,362 INFO L87 Difference]: Start difference. First operand 299 states and 371 transitions. Second operand has 74 states, 74 states have (on average 3.918918918918919) internal successors, (290), 73 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:29,426 INFO L93 Difference]: Finished difference Result 673 states and 891 transitions. [2022-01-31 23:12:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 23:12:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.918918918918919) internal successors, (290), 73 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2022-01-31 23:12:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:29,429 INFO L225 Difference]: With dead ends: 673 [2022-01-31 23:12:29,429 INFO L226 Difference]: Without dead ends: 661 [2022-01-31 23:12:29,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2704, Invalid=2846, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 23:12:29,430 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1500 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:29,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1571 Valid, 501 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-31 23:12:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 303. [2022-01-31 23:12:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 297 states have (on average 1.2491582491582491) internal successors, (371), 297 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 376 transitions. [2022-01-31 23:12:29,437 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 376 transitions. Word has length 294 [2022-01-31 23:12:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:29,437 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 376 transitions. [2022-01-31 23:12:29,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.918918918918919) internal successors, (290), 73 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 376 transitions. [2022-01-31 23:12:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-31 23:12:29,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:29,438 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:29,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 23:12:29,438 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:29,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1396497714, now seen corresponding path program 71 times [2022-01-31 23:12:29,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:29,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571993872] [2022-01-31 23:12:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:29,448 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:29,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:29,477 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:31,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:31,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571993872] [2022-01-31 23:12:31,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1571993872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:31,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:31,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 23:12:31,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531135981] [2022-01-31 23:12:31,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:31,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 23:12:31,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:31,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 23:12:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 23:12:31,283 INFO L87 Difference]: Start difference. First operand 303 states and 376 transitions. Second operand has 75 states, 75 states have (on average 3.92) internal successors, (294), 74 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:32,387 INFO L93 Difference]: Finished difference Result 682 states and 903 transitions. [2022-01-31 23:12:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 23:12:32,387 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.92) internal successors, (294), 74 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2022-01-31 23:12:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:32,389 INFO L225 Difference]: With dead ends: 682 [2022-01-31 23:12:32,390 INFO L226 Difference]: Without dead ends: 670 [2022-01-31 23:12:32,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2778, Invalid=2922, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 23:12:32,390 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1357 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:32,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1429 Valid, 526 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-31 23:12:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 307. [2022-01-31 23:12:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.2491694352159468) internal successors, (376), 301 states have internal predecessors, (376), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 381 transitions. [2022-01-31 23:12:32,398 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 381 transitions. Word has length 298 [2022-01-31 23:12:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:32,398 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 381 transitions. [2022-01-31 23:12:32,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.92) internal successors, (294), 74 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 381 transitions. [2022-01-31 23:12:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-31 23:12:32,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:32,399 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:32,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 23:12:32,400 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1940679475, now seen corresponding path program 72 times [2022-01-31 23:12:32,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:32,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705171625] [2022-01-31 23:12:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:32,404 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:32,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:32,437 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:34,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:34,340 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705171625] [2022-01-31 23:12:34,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1705171625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:34,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:34,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 23:12:34,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958371361] [2022-01-31 23:12:34,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:34,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 23:12:34,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 23:12:34,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 23:12:34,343 INFO L87 Difference]: Start difference. First operand 307 states and 381 transitions. Second operand has 76 states, 76 states have (on average 3.9210526315789473) internal successors, (298), 75 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:35,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:35,485 INFO L93 Difference]: Finished difference Result 691 states and 915 transitions. [2022-01-31 23:12:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 23:12:35,485 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.9210526315789473) internal successors, (298), 75 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2022-01-31 23:12:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:35,487 INFO L225 Difference]: With dead ends: 691 [2022-01-31 23:12:35,487 INFO L226 Difference]: Without dead ends: 679 [2022-01-31 23:12:35,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2853, Invalid=2999, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 23:12:35,488 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1280 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:35,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1353 Valid, 532 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-31 23:12:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 311. [2022-01-31 23:12:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 305 states have (on average 1.2491803278688525) internal successors, (381), 305 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 386 transitions. [2022-01-31 23:12:35,495 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 386 transitions. Word has length 302 [2022-01-31 23:12:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:35,495 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 386 transitions. [2022-01-31 23:12:35,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.9210526315789473) internal successors, (298), 75 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 386 transitions. [2022-01-31 23:12:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-31 23:12:35,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:35,496 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:35,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 23:12:35,496 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1707017960, now seen corresponding path program 73 times [2022-01-31 23:12:35,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:35,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373420803] [2022-01-31 23:12:35,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:35,500 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:35,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:35,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:37,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:37,449 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:37,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373420803] [2022-01-31 23:12:37,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [373420803] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:37,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:37,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 23:12:37,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818084399] [2022-01-31 23:12:37,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:37,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 23:12:37,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:37,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 23:12:37,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 23:12:37,451 INFO L87 Difference]: Start difference. First operand 311 states and 386 transitions. Second operand has 77 states, 77 states have (on average 3.9220779220779223) internal successors, (302), 76 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:38,713 INFO L93 Difference]: Finished difference Result 700 states and 927 transitions. [2022-01-31 23:12:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 23:12:38,713 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.9220779220779223) internal successors, (302), 76 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 306 [2022-01-31 23:12:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:38,715 INFO L225 Difference]: With dead ends: 700 [2022-01-31 23:12:38,715 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 23:12:38,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2929, Invalid=3077, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 23:12:38,716 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1646 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:38,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1720 Valid, 530 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 23:12:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 315. [2022-01-31 23:12:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.249190938511327) internal successors, (386), 309 states have internal predecessors, (386), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 391 transitions. [2022-01-31 23:12:38,724 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 391 transitions. Word has length 306 [2022-01-31 23:12:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:38,724 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 391 transitions. [2022-01-31 23:12:38,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.9220779220779223) internal successors, (302), 76 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 391 transitions. [2022-01-31 23:12:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-31 23:12:38,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:38,726 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:38,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 23:12:38,726 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash 643959933, now seen corresponding path program 74 times [2022-01-31 23:12:38,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:38,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472755179] [2022-01-31 23:12:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:38,733 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:38,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:38,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:40,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:40,749 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:40,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472755179] [2022-01-31 23:12:40,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472755179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:40,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:40,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 23:12:40,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453376863] [2022-01-31 23:12:40,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:40,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 23:12:40,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:40,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 23:12:40,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 23:12:40,752 INFO L87 Difference]: Start difference. First operand 315 states and 391 transitions. Second operand has 78 states, 78 states have (on average 3.923076923076923) internal successors, (306), 77 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:42,060 INFO L93 Difference]: Finished difference Result 709 states and 939 transitions. [2022-01-31 23:12:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 23:12:42,060 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.923076923076923) internal successors, (306), 77 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2022-01-31 23:12:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:42,062 INFO L225 Difference]: With dead ends: 709 [2022-01-31 23:12:42,062 INFO L226 Difference]: Without dead ends: 697 [2022-01-31 23:12:42,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3006, Invalid=3156, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 23:12:42,063 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 1559 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:42,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1634 Valid, 541 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-01-31 23:12:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 319. [2022-01-31 23:12:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 313 states have (on average 1.2492012779552715) internal successors, (391), 313 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 396 transitions. [2022-01-31 23:12:42,075 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 396 transitions. Word has length 310 [2022-01-31 23:12:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:42,075 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 396 transitions. [2022-01-31 23:12:42,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.923076923076923) internal successors, (306), 77 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 396 transitions. [2022-01-31 23:12:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-01-31 23:12:42,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:42,077 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:42,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 23:12:42,078 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:42,078 INFO L85 PathProgramCache]: Analyzing trace with hash -883890846, now seen corresponding path program 75 times [2022-01-31 23:12:42,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:42,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604463460] [2022-01-31 23:12:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:42,085 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:42,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:42,133 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:44,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:44,159 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 23:12:44,159 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604463460] [2022-01-31 23:12:44,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1604463460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:44,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:44,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 23:12:44,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055086791] [2022-01-31 23:12:44,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:44,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 23:12:44,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:44,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 23:12:44,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 23:12:44,162 INFO L87 Difference]: Start difference. First operand 319 states and 396 transitions. Second operand has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 78 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:45,405 INFO L93 Difference]: Finished difference Result 718 states and 951 transitions. [2022-01-31 23:12:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 23:12:45,406 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 78 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2022-01-31 23:12:45,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:45,407 INFO L225 Difference]: With dead ends: 718 [2022-01-31 23:12:45,408 INFO L226 Difference]: Without dead ends: 706 [2022-01-31 23:12:45,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3084, Invalid=3236, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 23:12:45,408 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1481 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:45,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 543 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-31 23:12:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 323. [2022-01-31 23:12:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 317 states have (on average 1.249211356466877) internal successors, (396), 317 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 401 transitions. [2022-01-31 23:12:45,416 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 401 transitions. Word has length 314 [2022-01-31 23:12:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:45,416 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 401 transitions. [2022-01-31 23:12:45,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 78 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 401 transitions. [2022-01-31 23:12:45,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 23:12:45,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:45,418 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:45,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 23:12:45,418 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:45,418 INFO L85 PathProgramCache]: Analyzing trace with hash 967754695, now seen corresponding path program 76 times [2022-01-31 23:12:45,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:45,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189210333] [2022-01-31 23:12:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:45,430 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:45,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:45,467 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:47,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:47,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:47,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189210333] [2022-01-31 23:12:47,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [189210333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:47,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:47,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 23:12:47,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811780173] [2022-01-31 23:12:47,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:47,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 23:12:47,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 23:12:47,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 23:12:47,548 INFO L87 Difference]: Start difference. First operand 323 states and 401 transitions. Second operand has 80 states, 80 states have (on average 3.925) internal successors, (314), 79 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:48,872 INFO L93 Difference]: Finished difference Result 727 states and 963 transitions. [2022-01-31 23:12:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 23:12:48,873 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.925) internal successors, (314), 79 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2022-01-31 23:12:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:48,879 INFO L225 Difference]: With dead ends: 727 [2022-01-31 23:12:48,879 INFO L226 Difference]: Without dead ends: 715 [2022-01-31 23:12:48,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3163, Invalid=3317, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 23:12:48,880 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1676 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:48,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1753 Valid, 562 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:12:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-31 23:12:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 327. [2022-01-31 23:12:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 321 states have (on average 1.249221183800623) internal successors, (401), 321 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 406 transitions. [2022-01-31 23:12:48,888 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 406 transitions. Word has length 318 [2022-01-31 23:12:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:48,889 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 406 transitions. [2022-01-31 23:12:48,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.925) internal successors, (314), 79 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 406 transitions. [2022-01-31 23:12:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-01-31 23:12:48,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:48,890 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:48,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 23:12:48,890 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:48,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:48,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1870456748, now seen corresponding path program 77 times [2022-01-31 23:12:48,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:48,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769476708] [2022-01-31 23:12:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:48,894 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:48,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:48,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:51,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:51,077 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:51,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769476708] [2022-01-31 23:12:51,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [769476708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:51,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:51,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 23:12:51,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750318245] [2022-01-31 23:12:51,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:51,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 23:12:51,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 23:12:51,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 23:12:51,080 INFO L87 Difference]: Start difference. First operand 327 states and 406 transitions. Second operand has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 80 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:52,572 INFO L93 Difference]: Finished difference Result 736 states and 975 transitions. [2022-01-31 23:12:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 23:12:52,572 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 80 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 322 [2022-01-31 23:12:52,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:52,574 INFO L225 Difference]: With dead ends: 736 [2022-01-31 23:12:52,574 INFO L226 Difference]: Without dead ends: 724 [2022-01-31 23:12:52,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3243, Invalid=3399, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 23:12:52,575 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1572 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:52,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1650 Valid, 549 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:12:52,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-31 23:12:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 331. [2022-01-31 23:12:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 325 states have (on average 1.2492307692307691) internal successors, (406), 325 states have internal predecessors, (406), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 411 transitions. [2022-01-31 23:12:52,583 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 411 transitions. Word has length 322 [2022-01-31 23:12:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:52,583 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 411 transitions. [2022-01-31 23:12:52,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 80 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:52,583 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 411 transitions. [2022-01-31 23:12:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 23:12:52,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:52,585 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:52,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 23:12:52,585 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash 136089873, now seen corresponding path program 78 times [2022-01-31 23:12:52,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:52,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014233847] [2022-01-31 23:12:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:52,593 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:52,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:52,629 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:54,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:54,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014233847] [2022-01-31 23:12:54,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014233847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:54,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:54,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 23:12:54,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365325596] [2022-01-31 23:12:54,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:54,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 23:12:54,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:54,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 23:12:54,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 23:12:54,756 INFO L87 Difference]: Start difference. First operand 331 states and 411 transitions. Second operand has 82 states, 82 states have (on average 3.926829268292683) internal successors, (322), 81 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:56,194 INFO L93 Difference]: Finished difference Result 745 states and 987 transitions. [2022-01-31 23:12:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 23:12:56,194 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.926829268292683) internal successors, (322), 81 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 326 [2022-01-31 23:12:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:56,196 INFO L225 Difference]: With dead ends: 745 [2022-01-31 23:12:56,196 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 23:12:56,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3324, Invalid=3482, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 23:12:56,197 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1577 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1656 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:56,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1656 Valid, 568 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:12:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 23:12:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 335. [2022-01-31 23:12:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 329 states have (on average 1.249240121580547) internal successors, (411), 329 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 416 transitions. [2022-01-31 23:12:56,205 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 416 transitions. Word has length 326 [2022-01-31 23:12:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:56,205 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 416 transitions. [2022-01-31 23:12:56,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.926829268292683) internal successors, (322), 81 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 416 transitions. [2022-01-31 23:12:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-01-31 23:12:56,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:56,206 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:56,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 23:12:56,207 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1940979722, now seen corresponding path program 79 times [2022-01-31 23:12:56,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:56,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487917629] [2022-01-31 23:12:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:56,215 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:56,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:56,257 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:58,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:58,523 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:58,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487917629] [2022-01-31 23:12:58,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487917629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:58,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:58,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 23:12:58,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166444295] [2022-01-31 23:12:58,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:58,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 23:12:58,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:58,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 23:12:58,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 23:12:58,526 INFO L87 Difference]: Start difference. First operand 335 states and 416 transitions. Second operand has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 82 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:00,101 INFO L93 Difference]: Finished difference Result 754 states and 999 transitions. [2022-01-31 23:13:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 23:13:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 82 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2022-01-31 23:13:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:00,103 INFO L225 Difference]: With dead ends: 754 [2022-01-31 23:13:00,103 INFO L226 Difference]: Without dead ends: 742 [2022-01-31 23:13:00,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3406, Invalid=3566, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 23:13:00,104 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1323 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:00,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1403 Valid, 593 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-01-31 23:13:00,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 339. [2022-01-31 23:13:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 333 states have (on average 1.2492492492492493) internal successors, (416), 333 states have internal predecessors, (416), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:00,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 421 transitions. [2022-01-31 23:13:00,112 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 421 transitions. Word has length 330 [2022-01-31 23:13:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:00,113 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 421 transitions. [2022-01-31 23:13:00,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 82 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 421 transitions. [2022-01-31 23:13:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-01-31 23:13:00,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:00,114 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:00,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 23:13:00,114 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:00,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:00,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1036684197, now seen corresponding path program 80 times [2022-01-31 23:13:00,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:00,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785680232] [2022-01-31 23:13:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:00,119 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:00,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:00,169 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:02,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:02,420 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:02,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785680232] [2022-01-31 23:13:02,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [785680232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:02,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:02,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 23:13:02,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603346041] [2022-01-31 23:13:02,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:02,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 23:13:02,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 23:13:02,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 23:13:02,423 INFO L87 Difference]: Start difference. First operand 339 states and 421 transitions. Second operand has 84 states, 84 states have (on average 3.9285714285714284) internal successors, (330), 83 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:04,021 INFO L93 Difference]: Finished difference Result 763 states and 1011 transitions. [2022-01-31 23:13:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 23:13:04,021 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.9285714285714284) internal successors, (330), 83 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334 [2022-01-31 23:13:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:04,023 INFO L225 Difference]: With dead ends: 763 [2022-01-31 23:13:04,023 INFO L226 Difference]: Without dead ends: 751 [2022-01-31 23:13:04,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3489, Invalid=3651, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 23:13:04,024 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1751 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1832 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:04,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1832 Valid, 575 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-31 23:13:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 343. [2022-01-31 23:13:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 337 states have (on average 1.2492581602373887) internal successors, (421), 337 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 426 transitions. [2022-01-31 23:13:04,032 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 426 transitions. Word has length 334 [2022-01-31 23:13:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:04,032 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 426 transitions. [2022-01-31 23:13:04,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.9285714285714284) internal successors, (330), 83 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 426 transitions. [2022-01-31 23:13:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-01-31 23:13:04,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:04,034 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:04,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 23:13:04,034 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:04,034 INFO L85 PathProgramCache]: Analyzing trace with hash -45011392, now seen corresponding path program 81 times [2022-01-31 23:13:04,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:04,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004942279] [2022-01-31 23:13:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:04,041 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:04,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:04,091 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:06,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:06,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004942279] [2022-01-31 23:13:06,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1004942279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:06,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:06,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 23:13:06,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011181229] [2022-01-31 23:13:06,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:06,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 23:13:06,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:06,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 23:13:06,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 23:13:06,572 INFO L87 Difference]: Start difference. First operand 343 states and 426 transitions. Second operand has 85 states, 85 states have (on average 3.929411764705882) internal successors, (334), 84 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:08,281 INFO L93 Difference]: Finished difference Result 772 states and 1023 transitions. [2022-01-31 23:13:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 23:13:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.929411764705882) internal successors, (334), 84 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 338 [2022-01-31 23:13:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:08,283 INFO L225 Difference]: With dead ends: 772 [2022-01-31 23:13:08,283 INFO L226 Difference]: Without dead ends: 760 [2022-01-31 23:13:08,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3573, Invalid=3737, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 23:13:08,284 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1567 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:08,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1649 Valid, 589 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-31 23:13:08,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 347. [2022-01-31 23:13:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 341 states have (on average 1.249266862170088) internal successors, (426), 341 states have internal predecessors, (426), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 431 transitions. [2022-01-31 23:13:08,293 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 431 transitions. Word has length 338 [2022-01-31 23:13:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:08,293 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 431 transitions. [2022-01-31 23:13:08,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.929411764705882) internal successors, (334), 84 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:08,293 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 431 transitions. [2022-01-31 23:13:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-31 23:13:08,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:08,294 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:08,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 23:13:08,295 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:08,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1854107045, now seen corresponding path program 82 times [2022-01-31 23:13:08,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:08,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563127577] [2022-01-31 23:13:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:08,299 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:08,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:08,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:10,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:10,845 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:10,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563127577] [2022-01-31 23:13:10,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563127577] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:10,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:10,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 23:13:10,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947986167] [2022-01-31 23:13:10,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:10,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 23:13:10,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:10,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 23:13:10,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 23:13:10,847 INFO L87 Difference]: Start difference. First operand 347 states and 431 transitions. Second operand has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 85 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:12,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:12,679 INFO L93 Difference]: Finished difference Result 781 states and 1035 transitions. [2022-01-31 23:13:12,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 23:13:12,679 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 85 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 342 [2022-01-31 23:13:12,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:12,681 INFO L225 Difference]: With dead ends: 781 [2022-01-31 23:13:12,681 INFO L226 Difference]: Without dead ends: 769 [2022-01-31 23:13:12,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3658, Invalid=3824, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 23:13:12,682 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1355 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:12,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1438 Valid, 605 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:13:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-31 23:13:12,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 351. [2022-01-31 23:13:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 345 states have (on average 1.2492753623188406) internal successors, (431), 345 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 436 transitions. [2022-01-31 23:13:12,697 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 436 transitions. Word has length 342 [2022-01-31 23:13:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:12,697 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 436 transitions. [2022-01-31 23:13:12,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 85 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:12,697 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 436 transitions. [2022-01-31 23:13:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-01-31 23:13:12,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:12,699 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:12,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 23:13:12,700 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1947038346, now seen corresponding path program 83 times [2022-01-31 23:13:12,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:12,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605155633] [2022-01-31 23:13:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:12,704 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:12,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:12,770 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:15,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:15,257 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:15,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605155633] [2022-01-31 23:13:15,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [605155633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:15,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:15,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 23:13:15,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399643380] [2022-01-31 23:13:15,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:15,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 23:13:15,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:15,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 23:13:15,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 23:13:15,260 INFO L87 Difference]: Start difference. First operand 351 states and 436 transitions. Second operand has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 86 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:16,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:16,976 INFO L93 Difference]: Finished difference Result 790 states and 1047 transitions. [2022-01-31 23:13:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 23:13:16,976 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 86 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 346 [2022-01-31 23:13:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:16,978 INFO L225 Difference]: With dead ends: 790 [2022-01-31 23:13:16,978 INFO L226 Difference]: Without dead ends: 778 [2022-01-31 23:13:16,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3744, Invalid=3912, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 23:13:16,979 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1609 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:16,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1693 Valid, 587 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:16,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-31 23:13:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 355. [2022-01-31 23:13:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.2492836676217765) internal successors, (436), 349 states have internal predecessors, (436), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 441 transitions. [2022-01-31 23:13:16,988 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 441 transitions. Word has length 346 [2022-01-31 23:13:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:16,989 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 441 transitions. [2022-01-31 23:13:16,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 86 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 441 transitions. [2022-01-31 23:13:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-31 23:13:16,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:16,990 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:16,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 23:13:16,990 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:16,991 INFO L85 PathProgramCache]: Analyzing trace with hash -376406801, now seen corresponding path program 84 times [2022-01-31 23:13:16,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:16,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598627731] [2022-01-31 23:13:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:16,999 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:16,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:17,062 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:19,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:19,683 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:19,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598627731] [2022-01-31 23:13:19,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [598627731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:19,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:19,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 23:13:19,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807620912] [2022-01-31 23:13:19,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:19,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 23:13:19,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 23:13:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 23:13:19,685 INFO L87 Difference]: Start difference. First operand 355 states and 441 transitions. Second operand has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 87 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:21,555 INFO L93 Difference]: Finished difference Result 799 states and 1059 transitions. [2022-01-31 23:13:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 23:13:21,556 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 87 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-01-31 23:13:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:21,558 INFO L225 Difference]: With dead ends: 799 [2022-01-31 23:13:21,558 INFO L226 Difference]: Without dead ends: 787 [2022-01-31 23:13:21,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3831, Invalid=4001, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 23:13:21,559 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1516 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1601 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:21,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1601 Valid, 641 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-31 23:13:21,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 359. [2022-01-31 23:13:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 353 states have (on average 1.2492917847025495) internal successors, (441), 353 states have internal predecessors, (441), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:21,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 446 transitions. [2022-01-31 23:13:21,568 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 446 transitions. Word has length 350 [2022-01-31 23:13:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:21,568 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 446 transitions. [2022-01-31 23:13:21,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 87 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 446 transitions. [2022-01-31 23:13:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-01-31 23:13:21,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:21,570 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:21,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 23:13:21,570 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:21,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2014170324, now seen corresponding path program 85 times [2022-01-31 23:13:21,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:21,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555565267] [2022-01-31 23:13:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:21,575 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:21,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:21,675 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:24,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:24,263 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555565267] [2022-01-31 23:13:24,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555565267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:24,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:24,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 23:13:24,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035714827] [2022-01-31 23:13:24,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:24,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 23:13:24,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 23:13:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 23:13:24,266 INFO L87 Difference]: Start difference. First operand 359 states and 446 transitions. Second operand has 89 states, 89 states have (on average 3.932584269662921) internal successors, (350), 88 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:26,027 INFO L93 Difference]: Finished difference Result 808 states and 1071 transitions. [2022-01-31 23:13:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 23:13:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.932584269662921) internal successors, (350), 88 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 354 [2022-01-31 23:13:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:26,029 INFO L225 Difference]: With dead ends: 808 [2022-01-31 23:13:26,029 INFO L226 Difference]: Without dead ends: 796 [2022-01-31 23:13:26,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3919, Invalid=4091, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 23:13:26,030 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1773 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:26,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1859 Valid, 598 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-01-31 23:13:26,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 363. [2022-01-31 23:13:26,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 357 states have (on average 1.2492997198879552) internal successors, (446), 357 states have internal predecessors, (446), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 451 transitions. [2022-01-31 23:13:26,038 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 451 transitions. Word has length 354 [2022-01-31 23:13:26,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:26,038 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 451 transitions. [2022-01-31 23:13:26,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.932584269662921) internal successors, (350), 88 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 451 transitions. [2022-01-31 23:13:26,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-01-31 23:13:26,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:26,040 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:26,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 23:13:26,040 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:26,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash -437870023, now seen corresponding path program 86 times [2022-01-31 23:13:26,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:26,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487637094] [2022-01-31 23:13:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:26,044 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:26,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:26,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:28,722 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:28,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487637094] [2022-01-31 23:13:28,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487637094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:28,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:28,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 23:13:28,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721515393] [2022-01-31 23:13:28,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:28,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 23:13:28,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 23:13:28,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 23:13:28,725 INFO L87 Difference]: Start difference. First operand 363 states and 451 transitions. Second operand has 90 states, 90 states have (on average 3.933333333333333) internal successors, (354), 89 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:30,640 INFO L93 Difference]: Finished difference Result 817 states and 1083 transitions. [2022-01-31 23:13:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 23:13:30,640 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.933333333333333) internal successors, (354), 89 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 358 [2022-01-31 23:13:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:30,642 INFO L225 Difference]: With dead ends: 817 [2022-01-31 23:13:30,642 INFO L226 Difference]: Without dead ends: 805 [2022-01-31 23:13:30,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4008, Invalid=4182, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 23:13:30,655 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1589 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:30,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 633 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:13:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-31 23:13:30,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 367. [2022-01-31 23:13:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.2493074792243768) internal successors, (451), 361 states have internal predecessors, (451), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 456 transitions. [2022-01-31 23:13:30,665 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 456 transitions. Word has length 358 [2022-01-31 23:13:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:30,665 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 456 transitions. [2022-01-31 23:13:30,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.933333333333333) internal successors, (354), 89 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 456 transitions. [2022-01-31 23:13:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-01-31 23:13:30,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:30,667 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:30,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 23:13:30,667 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:30,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:30,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1725709598, now seen corresponding path program 87 times [2022-01-31 23:13:30,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:30,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414044043] [2022-01-31 23:13:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:30,674 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:30,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:30,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:33,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:33,422 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:33,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414044043] [2022-01-31 23:13:33,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [414044043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:33,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:33,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 23:13:33,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869234543] [2022-01-31 23:13:33,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:33,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 23:13:33,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:33,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 23:13:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 23:13:33,425 INFO L87 Difference]: Start difference. First operand 367 states and 456 transitions. Second operand has 91 states, 91 states have (on average 3.934065934065934) internal successors, (358), 90 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:35,398 INFO L93 Difference]: Finished difference Result 826 states and 1095 transitions. [2022-01-31 23:13:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 23:13:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.934065934065934) internal successors, (358), 90 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 362 [2022-01-31 23:13:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:35,400 INFO L225 Difference]: With dead ends: 826 [2022-01-31 23:13:35,400 INFO L226 Difference]: Without dead ends: 814 [2022-01-31 23:13:35,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4098, Invalid=4274, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 23:13:35,401 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1729 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1817 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:35,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1817 Valid, 629 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:13:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-31 23:13:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 371. [2022-01-31 23:13:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 365 states have (on average 1.2493150684931507) internal successors, (456), 365 states have internal predecessors, (456), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 461 transitions. [2022-01-31 23:13:35,414 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 461 transitions. Word has length 362 [2022-01-31 23:13:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:35,414 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 461 transitions. [2022-01-31 23:13:35,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.934065934065934) internal successors, (358), 90 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:35,414 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 461 transitions. [2022-01-31 23:13:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-01-31 23:13:35,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:35,416 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:35,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 23:13:35,416 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:35,416 INFO L85 PathProgramCache]: Analyzing trace with hash -334504573, now seen corresponding path program 88 times [2022-01-31 23:13:35,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:35,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540572001] [2022-01-31 23:13:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:35,421 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:35,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:35,480 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:38,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:38,309 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:38,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540572001] [2022-01-31 23:13:38,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [540572001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:38,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:38,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 23:13:38,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487281976] [2022-01-31 23:13:38,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:38,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 23:13:38,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:38,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 23:13:38,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 23:13:38,312 INFO L87 Difference]: Start difference. First operand 371 states and 461 transitions. Second operand has 92 states, 92 states have (on average 3.9347826086956523) internal successors, (362), 91 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:40,235 INFO L93 Difference]: Finished difference Result 835 states and 1107 transitions. [2022-01-31 23:13:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 23:13:40,235 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.9347826086956523) internal successors, (362), 91 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 366 [2022-01-31 23:13:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:40,237 INFO L225 Difference]: With dead ends: 835 [2022-01-31 23:13:40,237 INFO L226 Difference]: Without dead ends: 823 [2022-01-31 23:13:40,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4189, Invalid=4367, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 23:13:40,238 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 1761 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:40,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 649 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-31 23:13:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 375. [2022-01-31 23:13:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 369 states have (on average 1.2493224932249323) internal successors, (461), 369 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 466 transitions. [2022-01-31 23:13:40,247 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 466 transitions. Word has length 366 [2022-01-31 23:13:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:40,248 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 466 transitions. [2022-01-31 23:13:40,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.9347826086956523) internal successors, (362), 91 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 466 transitions. [2022-01-31 23:13:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-01-31 23:13:40,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:40,249 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:40,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 23:13:40,249 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1946338152, now seen corresponding path program 89 times [2022-01-31 23:13:40,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:40,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649304545] [2022-01-31 23:13:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:40,255 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:40,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:40,315 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:43,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:43,165 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:43,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649304545] [2022-01-31 23:13:43,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [649304545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:43,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:43,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 23:13:43,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11559122] [2022-01-31 23:13:43,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:43,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 23:13:43,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 23:13:43,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 23:13:43,167 INFO L87 Difference]: Start difference. First operand 375 states and 466 transitions. Second operand has 93 states, 93 states have (on average 3.935483870967742) internal successors, (366), 92 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:45,263 INFO L93 Difference]: Finished difference Result 844 states and 1119 transitions. [2022-01-31 23:13:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 23:13:45,264 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.935483870967742) internal successors, (366), 92 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 370 [2022-01-31 23:13:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:45,265 INFO L225 Difference]: With dead ends: 844 [2022-01-31 23:13:45,266 INFO L226 Difference]: Without dead ends: 832 [2022-01-31 23:13:45,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4281, Invalid=4461, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 23:13:45,266 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 1649 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:45,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 660 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:45,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-31 23:13:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 379. [2022-01-31 23:13:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 373 states have (on average 1.2493297587131367) internal successors, (466), 373 states have internal predecessors, (466), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 471 transitions. [2022-01-31 23:13:45,278 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 471 transitions. Word has length 370 [2022-01-31 23:13:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:45,279 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 471 transitions. [2022-01-31 23:13:45,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.935483870967742) internal successors, (366), 92 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:45,279 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 471 transitions. [2022-01-31 23:13:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-01-31 23:13:45,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:45,280 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:45,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 23:13:45,280 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1519791821, now seen corresponding path program 90 times [2022-01-31 23:13:45,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:45,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725299394] [2022-01-31 23:13:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:45,296 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:45,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:45,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:48,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:48,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:48,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725299394] [2022-01-31 23:13:48,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [725299394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:48,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:48,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 23:13:48,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667467788] [2022-01-31 23:13:48,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:48,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 23:13:48,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:48,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 23:13:48,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 23:13:48,222 INFO L87 Difference]: Start difference. First operand 379 states and 471 transitions. Second operand has 94 states, 94 states have (on average 3.9361702127659575) internal successors, (370), 93 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:50,341 INFO L93 Difference]: Finished difference Result 853 states and 1131 transitions. [2022-01-31 23:13:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 23:13:50,341 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.9361702127659575) internal successors, (370), 93 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 374 [2022-01-31 23:13:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:50,343 INFO L225 Difference]: With dead ends: 853 [2022-01-31 23:13:50,343 INFO L226 Difference]: Without dead ends: 841 [2022-01-31 23:13:50,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4374, Invalid=4556, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 23:13:50,343 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 1868 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 730 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 730 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:50,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1959 Valid, 632 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [730 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:13:50,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-31 23:13:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 383. [2022-01-31 23:13:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 377 states have (on average 1.2493368700265253) internal successors, (471), 377 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 476 transitions. [2022-01-31 23:13:50,353 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 476 transitions. Word has length 374 [2022-01-31 23:13:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:50,353 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 476 transitions. [2022-01-31 23:13:50,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.9361702127659575) internal successors, (370), 93 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 476 transitions. [2022-01-31 23:13:50,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-01-31 23:13:50,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:50,355 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:50,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 23:13:50,355 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:50,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:50,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1458872398, now seen corresponding path program 91 times [2022-01-31 23:13:50,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:50,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23185824] [2022-01-31 23:13:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:50,360 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:50,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:50,417 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:53,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:53,313 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:53,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23185824] [2022-01-31 23:13:53,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [23185824] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:53,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:53,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 23:13:53,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817569091] [2022-01-31 23:13:53,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:53,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 23:13:53,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:53,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 23:13:53,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 23:13:53,316 INFO L87 Difference]: Start difference. First operand 383 states and 476 transitions. Second operand has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 94 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:55,594 INFO L93 Difference]: Finished difference Result 862 states and 1143 transitions. [2022-01-31 23:13:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 23:13:55,594 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 94 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 378 [2022-01-31 23:13:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:55,599 INFO L225 Difference]: With dead ends: 862 [2022-01-31 23:13:55,600 INFO L226 Difference]: Without dead ends: 850 [2022-01-31 23:13:55,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4468, Invalid=4652, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 23:13:55,600 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 2102 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2194 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:55,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2194 Valid, 648 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:13:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-31 23:13:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 387. [2022-01-31 23:13:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 381 states have (on average 1.2493438320209973) internal successors, (476), 381 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 481 transitions. [2022-01-31 23:13:55,610 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 481 transitions. Word has length 378 [2022-01-31 23:13:55,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:55,610 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 481 transitions. [2022-01-31 23:13:55,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 94 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 481 transitions. [2022-01-31 23:13:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-01-31 23:13:55,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:55,612 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:55,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 23:13:55,612 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1711511063, now seen corresponding path program 92 times [2022-01-31 23:13:55,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:55,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269144225] [2022-01-31 23:13:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:55,616 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:55,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:55,683 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:58,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:13:58,657 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:58,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269144225] [2022-01-31 23:13:58,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [269144225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:58,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:58,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 23:13:58,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076177475] [2022-01-31 23:13:58,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:58,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 23:13:58,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 23:13:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 23:13:58,725 INFO L87 Difference]: Start difference. First operand 387 states and 481 transitions. Second operand has 96 states, 96 states have (on average 3.9375) internal successors, (378), 95 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:00,846 INFO L93 Difference]: Finished difference Result 871 states and 1155 transitions. [2022-01-31 23:14:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 23:14:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.9375) internal successors, (378), 95 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 382 [2022-01-31 23:14:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:00,849 INFO L225 Difference]: With dead ends: 871 [2022-01-31 23:14:00,849 INFO L226 Difference]: Without dead ends: 859 [2022-01-31 23:14:00,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4563, Invalid=4749, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 23:14:00,850 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 2011 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:00,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2104 Valid, 646 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:14:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-31 23:14:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 391. [2022-01-31 23:14:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 385 states have (on average 1.2493506493506494) internal successors, (481), 385 states have internal predecessors, (481), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 486 transitions. [2022-01-31 23:14:00,860 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 486 transitions. Word has length 382 [2022-01-31 23:14:00,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:00,861 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 486 transitions. [2022-01-31 23:14:00,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.9375) internal successors, (378), 95 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 486 transitions. [2022-01-31 23:14:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-01-31 23:14:00,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:00,862 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:00,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 23:14:00,863 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:00,863 INFO L85 PathProgramCache]: Analyzing trace with hash -444591620, now seen corresponding path program 93 times [2022-01-31 23:14:00,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:00,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24073065] [2022-01-31 23:14:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:00,867 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:00,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:00,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:04,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:14:04,017 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:04,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24073065] [2022-01-31 23:14:04,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [24073065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:04,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:04,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 23:14:04,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460279568] [2022-01-31 23:14:04,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:04,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 23:14:04,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:04,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 23:14:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 23:14:04,020 INFO L87 Difference]: Start difference. First operand 391 states and 486 transitions. Second operand has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:06,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:06,302 INFO L93 Difference]: Finished difference Result 880 states and 1167 transitions. [2022-01-31 23:14:06,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 23:14:06,303 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 386 [2022-01-31 23:14:06,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:06,305 INFO L225 Difference]: With dead ends: 880 [2022-01-31 23:14:06,305 INFO L226 Difference]: Without dead ends: 868 [2022-01-31 23:14:06,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 23:14:06,306 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1815 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1909 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:06,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1909 Valid, 651 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:14:06,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-31 23:14:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 395. [2022-01-31 23:14:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 389 states have (on average 1.249357326478149) internal successors, (486), 389 states have internal predecessors, (486), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 491 transitions. [2022-01-31 23:14:06,316 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 491 transitions. Word has length 386 [2022-01-31 23:14:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:06,316 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 491 transitions. [2022-01-31 23:14:06,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:06,316 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 491 transitions. [2022-01-31 23:14:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-31 23:14:06,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:06,318 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:06,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 23:14:06,318 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:06,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash 417469281, now seen corresponding path program 94 times [2022-01-31 23:14:06,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:06,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081092437] [2022-01-31 23:14:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:06,323 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:06,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:06,401 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,460 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 23:14:09,461 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:09,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081092437] [2022-01-31 23:14:09,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081092437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:09,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:09,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 23:14:09,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641354624] [2022-01-31 23:14:09,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:09,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 23:14:09,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:09,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 23:14:09,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 23:14:09,464 INFO L87 Difference]: Start difference. First operand 395 states and 491 transitions. Second operand has 98 states, 98 states have (on average 3.938775510204082) internal successors, (386), 97 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:11,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:11,896 INFO L93 Difference]: Finished difference Result 889 states and 1179 transitions. [2022-01-31 23:14:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 23:14:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.938775510204082) internal successors, (386), 97 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 390 [2022-01-31 23:14:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:11,898 INFO L225 Difference]: With dead ends: 889 [2022-01-31 23:14:11,898 INFO L226 Difference]: Without dead ends: 877 [2022-01-31 23:14:11,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4756, Invalid=4946, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 23:14:11,899 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1864 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:11,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1959 Valid, 684 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:14:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-31 23:14:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 399. [2022-01-31 23:14:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 393 states have (on average 1.2493638676844783) internal successors, (491), 393 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 496 transitions. [2022-01-31 23:14:11,908 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 496 transitions. Word has length 390 [2022-01-31 23:14:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:11,909 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 496 transitions. [2022-01-31 23:14:11,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.938775510204082) internal successors, (386), 97 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:11,909 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 496 transitions. [2022-01-31 23:14:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-01-31 23:14:11,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:11,910 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:11,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 23:14:11,910 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash -555034042, now seen corresponding path program 95 times [2022-01-31 23:14:11,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:11,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373456741] [2022-01-31 23:14:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:11,914 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:11,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:11,986 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:15,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:14:15,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:15,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373456741] [2022-01-31 23:14:15,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373456741] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:15,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:15,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 23:14:15,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127563012] [2022-01-31 23:14:15,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:15,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 23:14:15,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:15,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 23:14:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 23:14:15,150 INFO L87 Difference]: Start difference. First operand 399 states and 496 transitions. Second operand has 99 states, 99 states have (on average 3.9393939393939394) internal successors, (390), 98 states have internal predecessors, (390), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:17,486 INFO L93 Difference]: Finished difference Result 898 states and 1191 transitions. [2022-01-31 23:14:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 23:14:17,486 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9393939393939394) internal successors, (390), 98 states have internal predecessors, (390), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 394 [2022-01-31 23:14:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:17,488 INFO L225 Difference]: With dead ends: 898 [2022-01-31 23:14:17,488 INFO L226 Difference]: Without dead ends: 886 [2022-01-31 23:14:17,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4854, Invalid=5046, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 23:14:17,489 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1879 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:17,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1975 Valid, 687 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:14:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-31 23:14:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 403. [2022-01-31 23:14:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 397 states have (on average 1.2493702770780857) internal successors, (496), 397 states have internal predecessors, (496), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 501 transitions. [2022-01-31 23:14:17,499 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 501 transitions. Word has length 394 [2022-01-31 23:14:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:17,499 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 501 transitions. [2022-01-31 23:14:17,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9393939393939394) internal successors, (390), 98 states have internal predecessors, (390), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 501 transitions. [2022-01-31 23:14:17,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-01-31 23:14:17,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:17,501 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:17,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 23:14:17,501 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:17,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:17,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1404806827, now seen corresponding path program 96 times [2022-01-31 23:14:17,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:17,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939088349] [2022-01-31 23:14:17,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:17,506 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:17,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:17,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:14:20,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:20,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939088349] [2022-01-31 23:14:20,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1939088349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:20,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:20,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 23:14:20,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747805953] [2022-01-31 23:14:20,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:20,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 23:14:20,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 23:14:20,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 23:14:20,777 INFO L87 Difference]: Start difference. First operand 403 states and 501 transitions. Second operand has 100 states, 100 states have (on average 3.94) internal successors, (394), 99 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:23,232 INFO L93 Difference]: Finished difference Result 907 states and 1203 transitions. [2022-01-31 23:14:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 23:14:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.94) internal successors, (394), 99 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 398 [2022-01-31 23:14:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:23,234 INFO L225 Difference]: With dead ends: 907 [2022-01-31 23:14:23,235 INFO L226 Difference]: Without dead ends: 895 [2022-01-31 23:14:23,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4953, Invalid=5147, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 23:14:23,235 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 2017 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2114 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:23,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2114 Valid, 674 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:14:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-31 23:14:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 407. [2022-01-31 23:14:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 401 states have (on average 1.2493765586034913) internal successors, (501), 401 states have internal predecessors, (501), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 506 transitions. [2022-01-31 23:14:23,245 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 506 transitions. Word has length 398 [2022-01-31 23:14:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:23,245 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 506 transitions. [2022-01-31 23:14:23,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.94) internal successors, (394), 99 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 506 transitions. [2022-01-31 23:14:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-01-31 23:14:23,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:23,247 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:23,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 23:14:23,247 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:23,247 INFO L85 PathProgramCache]: Analyzing trace with hash 550877328, now seen corresponding path program 97 times [2022-01-31 23:14:23,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:23,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417561554] [2022-01-31 23:14:23,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:23,252 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:23,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:23,318 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,600 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 23:14:26,600 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417561554] [2022-01-31 23:14:26,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417561554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:26,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:26,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 23:14:26,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451118592] [2022-01-31 23:14:26,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:26,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 23:14:26,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 23:14:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 23:14:26,607 INFO L87 Difference]: Start difference. First operand 407 states and 506 transitions. Second operand has 101 states, 101 states have (on average 3.9405940594059405) internal successors, (398), 100 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:29,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:29,095 INFO L93 Difference]: Finished difference Result 916 states and 1215 transitions. [2022-01-31 23:14:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 23:14:29,096 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.9405940594059405) internal successors, (398), 100 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 402 [2022-01-31 23:14:29,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:29,098 INFO L225 Difference]: With dead ends: 916 [2022-01-31 23:14:29,098 INFO L226 Difference]: Without dead ends: 904 [2022-01-31 23:14:29,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5053, Invalid=5249, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 23:14:29,099 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1921 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:29,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 693 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [744 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:14:29,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-31 23:14:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 411. [2022-01-31 23:14:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 405 states have (on average 1.2493827160493827) internal successors, (506), 405 states have internal predecessors, (506), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 511 transitions. [2022-01-31 23:14:29,112 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 511 transitions. Word has length 402 [2022-01-31 23:14:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:29,113 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 511 transitions. [2022-01-31 23:14:29,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.9405940594059405) internal successors, (398), 100 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 511 transitions. [2022-01-31 23:14:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-01-31 23:14:29,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:29,115 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:29,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 23:14:29,115 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:29,115 INFO L85 PathProgramCache]: Analyzing trace with hash -853913611, now seen corresponding path program 98 times [2022-01-31 23:14:29,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:29,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982526221] [2022-01-31 23:14:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:29,122 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:29,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:29,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:14:32,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:32,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982526221] [2022-01-31 23:14:32,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [982526221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:32,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:32,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 23:14:32,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39978957] [2022-01-31 23:14:32,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:32,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 23:14:32,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 23:14:32,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 23:14:32,567 INFO L87 Difference]: Start difference. First operand 411 states and 511 transitions. Second operand has 102 states, 102 states have (on average 3.9411764705882355) internal successors, (402), 101 states have internal predecessors, (402), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:35,090 INFO L93 Difference]: Finished difference Result 925 states and 1227 transitions. [2022-01-31 23:14:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 23:14:35,090 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.9411764705882355) internal successors, (402), 101 states have internal predecessors, (402), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 406 [2022-01-31 23:14:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:35,092 INFO L225 Difference]: With dead ends: 925 [2022-01-31 23:14:35,092 INFO L226 Difference]: Without dead ends: 913 [2022-01-31 23:14:35,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5154, Invalid=5352, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 23:14:35,093 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 2152 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:35,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 704 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:14:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-01-31 23:14:35,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 415. [2022-01-31 23:14:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 409 states have (on average 1.2493887530562346) internal successors, (511), 409 states have internal predecessors, (511), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 516 transitions. [2022-01-31 23:14:35,104 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 516 transitions. Word has length 406 [2022-01-31 23:14:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:35,105 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 516 transitions. [2022-01-31 23:14:35,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.9411764705882355) internal successors, (402), 101 states have internal predecessors, (402), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 516 transitions. [2022-01-31 23:14:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-01-31 23:14:35,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:35,106 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:35,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 23:14:35,107 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:35,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:35,107 INFO L85 PathProgramCache]: Analyzing trace with hash 214609114, now seen corresponding path program 99 times [2022-01-31 23:14:35,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:35,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456263633] [2022-01-31 23:14:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:35,111 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:35,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:35,244 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:14:38,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:38,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456263633] [2022-01-31 23:14:38,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [456263633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:38,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:38,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 23:14:38,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091632860] [2022-01-31 23:14:38,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:38,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 23:14:38,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:38,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 23:14:38,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 23:14:38,897 INFO L87 Difference]: Start difference. First operand 415 states and 516 transitions. Second operand has 103 states, 103 states have (on average 3.941747572815534) internal successors, (406), 102 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:41,566 INFO L93 Difference]: Finished difference Result 934 states and 1239 transitions. [2022-01-31 23:14:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 23:14:41,567 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.941747572815534) internal successors, (406), 102 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 410 [2022-01-31 23:14:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:41,568 INFO L225 Difference]: With dead ends: 934 [2022-01-31 23:14:41,568 INFO L226 Difference]: Without dead ends: 922 [2022-01-31 23:14:41,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 23:14:41,569 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 2869 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 1204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2969 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 2179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1204 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:41,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2969 Valid, 685 Invalid, 2179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1204 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:14:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-31 23:14:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 419. [2022-01-31 23:14:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 413 states have (on average 1.2493946731234866) internal successors, (516), 413 states have internal predecessors, (516), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 521 transitions. [2022-01-31 23:14:41,579 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 521 transitions. Word has length 410 [2022-01-31 23:14:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:41,579 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 521 transitions. [2022-01-31 23:14:41,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.941747572815534) internal successors, (406), 102 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 521 transitions. [2022-01-31 23:14:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-01-31 23:14:41,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:41,581 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:41,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 23:14:41,581 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:41,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:41,581 INFO L85 PathProgramCache]: Analyzing trace with hash 294129471, now seen corresponding path program 100 times [2022-01-31 23:14:41,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:41,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512654622] [2022-01-31 23:14:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:41,587 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:41,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:41,660 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:14:45,182 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:45,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512654622] [2022-01-31 23:14:45,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512654622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:45,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:45,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 23:14:45,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945564866] [2022-01-31 23:14:45,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:45,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 23:14:45,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 23:14:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 23:14:45,185 INFO L87 Difference]: Start difference. First operand 419 states and 521 transitions. Second operand has 104 states, 104 states have (on average 3.9423076923076925) internal successors, (410), 103 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:47,959 INFO L93 Difference]: Finished difference Result 943 states and 1251 transitions. [2022-01-31 23:14:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 23:14:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.9423076923076925) internal successors, (410), 103 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 414 [2022-01-31 23:14:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:47,961 INFO L225 Difference]: With dead ends: 943 [2022-01-31 23:14:47,961 INFO L226 Difference]: Without dead ends: 931 [2022-01-31 23:14:47,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5359, Invalid=5561, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 23:14:47,962 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 2475 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 1010 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1010 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:47,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2576 Valid, 714 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1010 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:14:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-01-31 23:14:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 423. [2022-01-31 23:14:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 417 states have (on average 1.249400479616307) internal successors, (521), 417 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 526 transitions. [2022-01-31 23:14:47,972 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 526 transitions. Word has length 414 [2022-01-31 23:14:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:47,972 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 526 transitions. [2022-01-31 23:14:47,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.9423076923076925) internal successors, (410), 103 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 526 transitions. [2022-01-31 23:14:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-01-31 23:14:47,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:47,974 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:47,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 23:14:47,974 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:47,974 INFO L85 PathProgramCache]: Analyzing trace with hash -632047836, now seen corresponding path program 101 times [2022-01-31 23:14:47,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:47,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686225610] [2022-01-31 23:14:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:47,983 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:47,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:48,084 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:51,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:14:51,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686225610] [2022-01-31 23:14:51,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [686225610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:51,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:51,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 23:14:51,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333028154] [2022-01-31 23:14:51,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:51,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 23:14:51,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:51,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 23:14:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 23:14:51,543 INFO L87 Difference]: Start difference. First operand 423 states and 526 transitions. Second operand has 105 states, 105 states have (on average 3.942857142857143) internal successors, (414), 104 states have internal predecessors, (414), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:54,424 INFO L93 Difference]: Finished difference Result 952 states and 1263 transitions. [2022-01-31 23:14:54,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 23:14:54,424 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.942857142857143) internal successors, (414), 104 states have internal predecessors, (414), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 418 [2022-01-31 23:14:54,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:54,426 INFO L225 Difference]: With dead ends: 952 [2022-01-31 23:14:54,426 INFO L226 Difference]: Without dead ends: 940 [2022-01-31 23:14:54,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5463, Invalid=5667, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 23:14:54,476 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 2306 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2408 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:54,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2408 Valid, 741 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:14:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-01-31 23:14:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 427. [2022-01-31 23:14:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 421 states have (on average 1.2494061757719714) internal successors, (526), 421 states have internal predecessors, (526), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 531 transitions. [2022-01-31 23:14:54,486 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 531 transitions. Word has length 418 [2022-01-31 23:14:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:54,487 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 531 transitions. [2022-01-31 23:14:54,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.942857142857143) internal successors, (414), 104 states have internal predecessors, (414), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 531 transitions. [2022-01-31 23:14:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-01-31 23:14:54,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:54,488 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:54,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 23:14:54,489 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2087787383, now seen corresponding path program 102 times [2022-01-31 23:14:54,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:54,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805666040] [2022-01-31 23:14:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:54,492 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:54,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:54,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:58,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:14:58,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:58,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805666040] [2022-01-31 23:14:58,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805666040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:58,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:58,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 23:14:58,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122535197] [2022-01-31 23:14:58,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:58,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 23:14:58,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 23:14:58,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 23:14:58,100 INFO L87 Difference]: Start difference. First operand 427 states and 531 transitions. Second operand has 106 states, 106 states have (on average 3.943396226415094) internal successors, (418), 105 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:01,133 INFO L93 Difference]: Finished difference Result 961 states and 1275 transitions. [2022-01-31 23:15:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 23:15:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.943396226415094) internal successors, (418), 105 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 422 [2022-01-31 23:15:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:01,135 INFO L225 Difference]: With dead ends: 961 [2022-01-31 23:15:01,135 INFO L226 Difference]: Without dead ends: 949 [2022-01-31 23:15:01,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5568, Invalid=5774, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 23:15:01,136 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 2416 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2519 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:01,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2519 Valid, 706 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:15:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-31 23:15:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 431. [2022-01-31 23:15:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 425 states have (on average 1.2494117647058824) internal successors, (531), 425 states have internal predecessors, (531), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 536 transitions. [2022-01-31 23:15:01,147 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 536 transitions. Word has length 422 [2022-01-31 23:15:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:01,147 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 536 transitions. [2022-01-31 23:15:01,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.943396226415094) internal successors, (418), 105 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 536 transitions. [2022-01-31 23:15:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-01-31 23:15:01,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:01,149 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:01,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 23:15:01,149 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:01,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:01,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1761945746, now seen corresponding path program 103 times [2022-01-31 23:15:01,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:01,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376030434] [2022-01-31 23:15:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:01,152 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:01,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:01,241 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:04,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:15:04,818 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:04,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376030434] [2022-01-31 23:15:04,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376030434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:04,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:04,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 23:15:04,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638247320] [2022-01-31 23:15:04,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:04,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 23:15:04,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:04,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 23:15:04,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 23:15:04,822 INFO L87 Difference]: Start difference. First operand 431 states and 536 transitions. Second operand has 107 states, 107 states have (on average 3.94392523364486) internal successors, (422), 106 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:07,994 INFO L93 Difference]: Finished difference Result 970 states and 1287 transitions. [2022-01-31 23:15:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 23:15:07,994 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.94392523364486) internal successors, (422), 106 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 426 [2022-01-31 23:15:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:07,996 INFO L225 Difference]: With dead ends: 970 [2022-01-31 23:15:07,996 INFO L226 Difference]: Without dead ends: 958 [2022-01-31 23:15:07,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5674, Invalid=5882, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 23:15:07,997 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 2579 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 1055 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2683 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1055 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:07,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2683 Valid, 725 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1055 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:15:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-01-31 23:15:08,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 435. [2022-01-31 23:15:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 429 states have (on average 1.2494172494172495) internal successors, (536), 429 states have internal predecessors, (536), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 541 transitions. [2022-01-31 23:15:08,007 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 541 transitions. Word has length 426 [2022-01-31 23:15:08,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:08,007 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 541 transitions. [2022-01-31 23:15:08,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.94392523364486) internal successors, (422), 106 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 541 transitions. [2022-01-31 23:15:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-01-31 23:15:08,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:08,008 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:08,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 23:15:08,009 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1538838483, now seen corresponding path program 104 times [2022-01-31 23:15:08,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279732078] [2022-01-31 23:15:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:08,013 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:08,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:08,086 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:11,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:15:11,710 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:11,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279732078] [2022-01-31 23:15:11,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279732078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:11,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:11,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 23:15:11,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172399655] [2022-01-31 23:15:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:11,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 23:15:11,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 23:15:11,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 23:15:11,714 INFO L87 Difference]: Start difference. First operand 435 states and 541 transitions. Second operand has 108 states, 108 states have (on average 3.9444444444444446) internal successors, (426), 107 states have internal predecessors, (426), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:14,921 INFO L93 Difference]: Finished difference Result 979 states and 1299 transitions. [2022-01-31 23:15:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 23:15:14,922 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.9444444444444446) internal successors, (426), 107 states have internal predecessors, (426), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 430 [2022-01-31 23:15:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:14,923 INFO L225 Difference]: With dead ends: 979 [2022-01-31 23:15:14,924 INFO L226 Difference]: Without dead ends: 967 [2022-01-31 23:15:14,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5781, Invalid=5991, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 23:15:14,924 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 2304 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2409 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:14,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2409 Valid, 730 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:15:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-01-31 23:15:14,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 439. [2022-01-31 23:15:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 433 states have (on average 1.2494226327944573) internal successors, (541), 433 states have internal predecessors, (541), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 546 transitions. [2022-01-31 23:15:14,936 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 546 transitions. Word has length 430 [2022-01-31 23:15:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:14,937 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 546 transitions. [2022-01-31 23:15:14,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.9444444444444446) internal successors, (426), 107 states have internal predecessors, (426), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 546 transitions. [2022-01-31 23:15:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-01-31 23:15:14,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:14,939 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:14,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 23:15:14,939 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:14,939 INFO L85 PathProgramCache]: Analyzing trace with hash 642387384, now seen corresponding path program 105 times [2022-01-31 23:15:14,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:14,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457162124] [2022-01-31 23:15:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:14,945 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:14,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:15,034 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:18,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:15:18,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:18,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457162124] [2022-01-31 23:15:18,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1457162124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:18,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:18,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 23:15:18,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062001755] [2022-01-31 23:15:18,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:18,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 23:15:18,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:18,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 23:15:18,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 23:15:18,862 INFO L87 Difference]: Start difference. First operand 439 states and 546 transitions. Second operand has 109 states, 109 states have (on average 3.944954128440367) internal successors, (430), 108 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:22,058 INFO L93 Difference]: Finished difference Result 988 states and 1311 transitions. [2022-01-31 23:15:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 23:15:22,063 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.944954128440367) internal successors, (430), 108 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 434 [2022-01-31 23:15:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:22,065 INFO L225 Difference]: With dead ends: 988 [2022-01-31 23:15:22,065 INFO L226 Difference]: Without dead ends: 976 [2022-01-31 23:15:22,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5889, Invalid=6101, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 23:15:22,066 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 2403 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 950 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:22,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2509 Valid, 730 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [950 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:15:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-01-31 23:15:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 443. [2022-01-31 23:15:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 437 states have (on average 1.2494279176201373) internal successors, (546), 437 states have internal predecessors, (546), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 551 transitions. [2022-01-31 23:15:22,078 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 551 transitions. Word has length 434 [2022-01-31 23:15:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:22,078 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 551 transitions. [2022-01-31 23:15:22,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.944954128440367) internal successors, (430), 108 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 551 transitions. [2022-01-31 23:15:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-01-31 23:15:22,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:22,080 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:22,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 23:15:22,080 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:22,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:22,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1466969827, now seen corresponding path program 106 times [2022-01-31 23:15:22,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:22,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720034123] [2022-01-31 23:15:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:22,083 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:22,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:22,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:26,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:15:26,091 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:26,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720034123] [2022-01-31 23:15:26,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [720034123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:26,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:26,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 23:15:26,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143622367] [2022-01-31 23:15:26,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:26,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 23:15:26,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 23:15:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 23:15:26,096 INFO L87 Difference]: Start difference. First operand 443 states and 551 transitions. Second operand has 110 states, 110 states have (on average 3.9454545454545453) internal successors, (434), 109 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:29,291 INFO L93 Difference]: Finished difference Result 997 states and 1323 transitions. [2022-01-31 23:15:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 23:15:29,292 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.9454545454545453) internal successors, (434), 109 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 438 [2022-01-31 23:15:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:29,294 INFO L225 Difference]: With dead ends: 997 [2022-01-31 23:15:29,294 INFO L226 Difference]: Without dead ends: 985 [2022-01-31 23:15:29,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5998, Invalid=6212, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 23:15:29,295 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 2043 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2150 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:29,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2150 Valid, 763 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:15:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-01-31 23:15:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 447. [2022-01-31 23:15:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 441 states have (on average 1.2494331065759636) internal successors, (551), 441 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 556 transitions. [2022-01-31 23:15:29,305 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 556 transitions. Word has length 438 [2022-01-31 23:15:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:29,305 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 556 transitions. [2022-01-31 23:15:29,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.9454545454545453) internal successors, (434), 109 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 556 transitions. [2022-01-31 23:15:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-01-31 23:15:29,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:29,307 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:29,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 23:15:29,307 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1103845890, now seen corresponding path program 107 times [2022-01-31 23:15:29,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:29,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368329779] [2022-01-31 23:15:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:29,311 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:29,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:29,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:33,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:15:33,122 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:33,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368329779] [2022-01-31 23:15:33,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368329779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:33,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:33,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 23:15:33,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981261739] [2022-01-31 23:15:33,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:33,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 23:15:33,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 23:15:33,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 23:15:33,126 INFO L87 Difference]: Start difference. First operand 447 states and 556 transitions. Second operand has 111 states, 111 states have (on average 3.945945945945946) internal successors, (438), 110 states have internal predecessors, (438), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:36,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:36,151 INFO L93 Difference]: Finished difference Result 1006 states and 1335 transitions. [2022-01-31 23:15:36,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 23:15:36,151 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 3.945945945945946) internal successors, (438), 110 states have internal predecessors, (438), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 442 [2022-01-31 23:15:36,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:36,153 INFO L225 Difference]: With dead ends: 1006 [2022-01-31 23:15:36,153 INFO L226 Difference]: Without dead ends: 994 [2022-01-31 23:15:36,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6108, Invalid=6324, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 23:15:36,154 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 2387 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2495 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 949 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:36,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2495 Valid, 761 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [949 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:15:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-01-31 23:15:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 451. [2022-01-31 23:15:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 445 states have (on average 1.249438202247191) internal successors, (556), 445 states have internal predecessors, (556), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 561 transitions. [2022-01-31 23:15:36,164 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 561 transitions. Word has length 442 [2022-01-31 23:15:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:36,165 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 561 transitions. [2022-01-31 23:15:36,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 3.945945945945946) internal successors, (438), 110 states have internal predecessors, (438), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 561 transitions. [2022-01-31 23:15:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-01-31 23:15:36,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:36,166 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:36,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 23:15:36,166 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1318971495, now seen corresponding path program 108 times [2022-01-31 23:15:36,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:36,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661703054] [2022-01-31 23:15:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:36,170 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:36,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:36,257 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:40,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:15:40,121 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:40,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661703054] [2022-01-31 23:15:40,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [661703054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:40,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:40,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 23:15:40,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572312652] [2022-01-31 23:15:40,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:40,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 23:15:40,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:40,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 23:15:40,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 23:15:40,125 INFO L87 Difference]: Start difference. First operand 451 states and 561 transitions. Second operand has 112 states, 112 states have (on average 3.9464285714285716) internal successors, (442), 111 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:43,683 INFO L93 Difference]: Finished difference Result 1015 states and 1347 transitions. [2022-01-31 23:15:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 23:15:43,684 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.9464285714285716) internal successors, (442), 111 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 446 [2022-01-31 23:15:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:43,685 INFO L225 Difference]: With dead ends: 1015 [2022-01-31 23:15:43,685 INFO L226 Difference]: Without dead ends: 1003 [2022-01-31 23:15:43,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6219, Invalid=6437, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 23:15:43,686 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 2458 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2567 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:43,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2567 Valid, 754 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [979 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:15:43,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-01-31 23:15:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 455. [2022-01-31 23:15:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 449 states have (on average 1.2494432071269488) internal successors, (561), 449 states have internal predecessors, (561), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 566 transitions. [2022-01-31 23:15:43,697 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 566 transitions. Word has length 446 [2022-01-31 23:15:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:43,697 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 566 transitions. [2022-01-31 23:15:43,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.9464285714285716) internal successors, (442), 111 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 566 transitions. [2022-01-31 23:15:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2022-01-31 23:15:43,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:43,699 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:43,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 23:15:43,699 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:43,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2030615628, now seen corresponding path program 109 times [2022-01-31 23:15:43,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:43,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087223333] [2022-01-31 23:15:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:43,703 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:43,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:43,778 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:47,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:15:47,737 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:47,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087223333] [2022-01-31 23:15:47,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087223333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:47,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:47,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 23:15:47,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735082928] [2022-01-31 23:15:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:47,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 23:15:47,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 23:15:47,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 23:15:47,741 INFO L87 Difference]: Start difference. First operand 455 states and 566 transitions. Second operand has 113 states, 113 states have (on average 3.9469026548672566) internal successors, (446), 112 states have internal predecessors, (446), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:51,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:51,194 INFO L93 Difference]: Finished difference Result 1024 states and 1359 transitions. [2022-01-31 23:15:51,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 23:15:51,195 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.9469026548672566) internal successors, (446), 112 states have internal predecessors, (446), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 450 [2022-01-31 23:15:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:51,197 INFO L225 Difference]: With dead ends: 1024 [2022-01-31 23:15:51,197 INFO L226 Difference]: Without dead ends: 1012 [2022-01-31 23:15:51,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6331, Invalid=6551, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 23:15:51,198 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 2207 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2317 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:51,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2317 Valid, 774 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:15:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-01-31 23:15:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 459. [2022-01-31 23:15:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 453 states have (on average 1.249448123620309) internal successors, (566), 453 states have internal predecessors, (566), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 571 transitions. [2022-01-31 23:15:51,212 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 571 transitions. Word has length 450 [2022-01-31 23:15:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:51,212 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 571 transitions. [2022-01-31 23:15:51,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.9469026548672566) internal successors, (446), 112 states have internal predecessors, (446), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 571 transitions. [2022-01-31 23:15:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-01-31 23:15:51,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:51,214 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:51,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 23:15:51,214 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:51,215 INFO L85 PathProgramCache]: Analyzing trace with hash 141366705, now seen corresponding path program 110 times [2022-01-31 23:15:51,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:51,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191134936] [2022-01-31 23:15:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:51,221 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:51,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:51,316 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:15:55,397 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:55,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191134936] [2022-01-31 23:15:55,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191134936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:55,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:55,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 23:15:55,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390989073] [2022-01-31 23:15:55,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:55,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 23:15:55,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 23:15:55,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 23:15:55,401 INFO L87 Difference]: Start difference. First operand 459 states and 571 transitions. Second operand has 114 states, 114 states have (on average 3.9473684210526314) internal successors, (450), 113 states have internal predecessors, (450), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:58,773 INFO L93 Difference]: Finished difference Result 1033 states and 1371 transitions. [2022-01-31 23:15:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 23:15:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.9473684210526314) internal successors, (450), 113 states have internal predecessors, (450), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 454 [2022-01-31 23:15:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:58,775 INFO L225 Difference]: With dead ends: 1033 [2022-01-31 23:15:58,775 INFO L226 Difference]: Without dead ends: 1021 [2022-01-31 23:15:58,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6444, Invalid=6666, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 23:15:58,776 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 2082 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2193 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 2127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:58,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2193 Valid, 786 Invalid, 2127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:15:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-31 23:15:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 463. [2022-01-31 23:15:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 457 states have (on average 1.24945295404814) internal successors, (571), 457 states have internal predecessors, (571), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 576 transitions. [2022-01-31 23:15:58,787 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 576 transitions. Word has length 454 [2022-01-31 23:15:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:58,787 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 576 transitions. [2022-01-31 23:15:58,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.9473684210526314) internal successors, (450), 113 states have internal predecessors, (450), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 576 transitions. [2022-01-31 23:15:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-01-31 23:15:58,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:58,789 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:58,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 23:15:58,789 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash 831272086, now seen corresponding path program 111 times [2022-01-31 23:15:58,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:58,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462210180] [2022-01-31 23:15:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:58,793 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:58,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:58,882 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:02,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:16:02,894 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:02,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462210180] [2022-01-31 23:16:02,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462210180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:02,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:02,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 23:16:02,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570907474] [2022-01-31 23:16:02,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:02,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 23:16:02,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:02,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 23:16:02,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 23:16:02,898 INFO L87 Difference]: Start difference. First operand 463 states and 576 transitions. Second operand has 115 states, 115 states have (on average 3.9478260869565216) internal successors, (454), 114 states have internal predecessors, (454), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:06,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:06,241 INFO L93 Difference]: Finished difference Result 1042 states and 1383 transitions. [2022-01-31 23:16:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 23:16:06,241 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 3.9478260869565216) internal successors, (454), 114 states have internal predecessors, (454), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 458 [2022-01-31 23:16:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:06,243 INFO L225 Difference]: With dead ends: 1042 [2022-01-31 23:16:06,243 INFO L226 Difference]: Without dead ends: 1030 [2022-01-31 23:16:06,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6558, Invalid=6782, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 23:16:06,248 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 2254 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2366 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:06,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2366 Valid, 779 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:16:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-01-31 23:16:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 467. [2022-01-31 23:16:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 461 states have (on average 1.2494577006507592) internal successors, (576), 461 states have internal predecessors, (576), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:16:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 581 transitions. [2022-01-31 23:16:06,260 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 581 transitions. Word has length 458 [2022-01-31 23:16:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:06,260 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 581 transitions. [2022-01-31 23:16:06,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 3.9478260869565216) internal successors, (454), 114 states have internal predecessors, (454), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 581 transitions. [2022-01-31 23:16:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2022-01-31 23:16:06,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:06,262 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:06,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 23:16:06,262 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:06,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1720146171, now seen corresponding path program 112 times [2022-01-31 23:16:06,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:06,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564292360] [2022-01-31 23:16:06,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:06,266 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:16:06,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:06,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:16:10,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:10,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564292360] [2022-01-31 23:16:10,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [564292360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:10,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:10,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 23:16:10,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919358799] [2022-01-31 23:16:10,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:10,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 23:16:10,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 23:16:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 23:16:10,551 INFO L87 Difference]: Start difference. First operand 467 states and 581 transitions. Second operand has 116 states, 116 states have (on average 3.9482758620689653) internal successors, (458), 115 states have internal predecessors, (458), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:14,141 INFO L93 Difference]: Finished difference Result 1051 states and 1395 transitions. [2022-01-31 23:16:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 23:16:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.9482758620689653) internal successors, (458), 115 states have internal predecessors, (458), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 462 [2022-01-31 23:16:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:14,143 INFO L225 Difference]: With dead ends: 1051 [2022-01-31 23:16:14,143 INFO L226 Difference]: Without dead ends: 1039 [2022-01-31 23:16:14,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6673, Invalid=6899, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 23:16:14,144 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 2373 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2486 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:14,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2486 Valid, 784 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:16:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-31 23:16:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 471. [2022-01-31 23:16:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 465 states have (on average 1.249462365591398) internal successors, (581), 465 states have internal predecessors, (581), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:16:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 586 transitions. [2022-01-31 23:16:14,155 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 586 transitions. Word has length 462 [2022-01-31 23:16:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:14,155 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 586 transitions. [2022-01-31 23:16:14,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.9482758620689653) internal successors, (458), 115 states have internal predecessors, (458), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 586 transitions. [2022-01-31 23:16:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-01-31 23:16:14,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:14,157 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:14,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 23:16:14,157 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:14,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1495285024, now seen corresponding path program 113 times [2022-01-31 23:16:14,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:14,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387992761] [2022-01-31 23:16:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:14,161 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:16:14,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:14,289 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:18,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:16:18,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387992761] [2022-01-31 23:16:18,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [387992761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:18,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:18,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 23:16:18,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701405237] [2022-01-31 23:16:18,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:18,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 23:16:18,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:18,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 23:16:18,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 23:16:18,432 INFO L87 Difference]: Start difference. First operand 471 states and 586 transitions. Second operand has 117 states, 117 states have (on average 3.948717948717949) internal successors, (462), 116 states have internal predecessors, (462), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:21,907 INFO L93 Difference]: Finished difference Result 1060 states and 1407 transitions. [2022-01-31 23:16:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 23:16:21,907 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.948717948717949) internal successors, (462), 116 states have internal predecessors, (462), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 466 [2022-01-31 23:16:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:21,909 INFO L225 Difference]: With dead ends: 1060 [2022-01-31 23:16:21,909 INFO L226 Difference]: Without dead ends: 1048 [2022-01-31 23:16:21,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6789, Invalid=7017, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 23:16:21,910 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 2200 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 2104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:21,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2314 Valid, 798 Invalid, 2104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:16:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-01-31 23:16:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 475. [2022-01-31 23:16:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 469 states have (on average 1.2494669509594882) internal successors, (586), 469 states have internal predecessors, (586), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:16:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 591 transitions. [2022-01-31 23:16:21,921 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 591 transitions. Word has length 466 [2022-01-31 23:16:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:21,922 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 591 transitions. [2022-01-31 23:16:21,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.948717948717949) internal successors, (462), 116 states have internal predecessors, (462), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 591 transitions. [2022-01-31 23:16:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-01-31 23:16:21,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:21,924 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:21,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 23:16:21,924 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:21,924 INFO L85 PathProgramCache]: Analyzing trace with hash -814304699, now seen corresponding path program 114 times [2022-01-31 23:16:21,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:21,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395229499] [2022-01-31 23:16:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:21,927 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:16:21,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:22,031 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:26,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:16:26,340 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395229499] [2022-01-31 23:16:26,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [395229499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:26,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:26,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 23:16:26,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645939250] [2022-01-31 23:16:26,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:26,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 23:16:26,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:26,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 23:16:26,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 23:16:26,344 INFO L87 Difference]: Start difference. First operand 475 states and 591 transitions. Second operand has 118 states, 118 states have (on average 3.9491525423728815) internal successors, (466), 117 states have internal predecessors, (466), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:29,888 INFO L93 Difference]: Finished difference Result 1069 states and 1419 transitions. [2022-01-31 23:16:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 23:16:29,888 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.9491525423728815) internal successors, (466), 117 states have internal predecessors, (466), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 470 [2022-01-31 23:16:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:29,890 INFO L225 Difference]: With dead ends: 1069 [2022-01-31 23:16:29,890 INFO L226 Difference]: Without dead ends: 1057 [2022-01-31 23:16:29,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6906, Invalid=7136, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 23:16:29,891 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 2707 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 1080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2822 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:29,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2822 Valid, 795 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1080 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:16:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-01-31 23:16:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 479. [2022-01-31 23:16:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 473 states have (on average 1.2494714587737843) internal successors, (591), 473 states have internal predecessors, (591), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:16:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 596 transitions. [2022-01-31 23:16:29,903 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 596 transitions. Word has length 470 [2022-01-31 23:16:29,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:29,903 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 596 transitions. [2022-01-31 23:16:29,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.9491525423728815) internal successors, (466), 117 states have internal predecessors, (466), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 596 transitions. [2022-01-31 23:16:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-01-31 23:16:29,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:29,905 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:29,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 23:16:29,905 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash -359831766, now seen corresponding path program 115 times [2022-01-31 23:16:29,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:29,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816704902] [2022-01-31 23:16:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:29,908 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:16:29,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:30,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:34,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:16:34,350 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:34,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816704902] [2022-01-31 23:16:34,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [816704902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:34,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:34,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 23:16:34,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636590297] [2022-01-31 23:16:34,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:34,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 23:16:34,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:34,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 23:16:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 23:16:34,353 INFO L87 Difference]: Start difference. First operand 479 states and 596 transitions. Second operand has 119 states, 119 states have (on average 3.9495798319327733) internal successors, (470), 118 states have internal predecessors, (470), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:38,405 INFO L93 Difference]: Finished difference Result 1078 states and 1431 transitions. [2022-01-31 23:16:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 23:16:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.9495798319327733) internal successors, (470), 118 states have internal predecessors, (470), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 474 [2022-01-31 23:16:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:38,407 INFO L225 Difference]: With dead ends: 1078 [2022-01-31 23:16:38,407 INFO L226 Difference]: Without dead ends: 1066 [2022-01-31 23:16:38,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7024, Invalid=7256, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 23:16:38,408 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 2912 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 1179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3028 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1179 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:38,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3028 Valid, 787 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1179 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:16:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-01-31 23:16:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 483. [2022-01-31 23:16:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 477 states have (on average 1.249475890985325) internal successors, (596), 477 states have internal predecessors, (596), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:16:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 601 transitions. [2022-01-31 23:16:38,419 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 601 transitions. Word has length 474 [2022-01-31 23:16:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:38,419 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 601 transitions. [2022-01-31 23:16:38,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.9495798319327733) internal successors, (470), 118 states have internal predecessors, (470), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 601 transitions. [2022-01-31 23:16:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-01-31 23:16:38,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:38,421 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:38,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 23:16:38,421 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2143625615, now seen corresponding path program 116 times [2022-01-31 23:16:38,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:38,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827216278] [2022-01-31 23:16:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:38,427 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:16:38,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:38,533 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:42,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:42,876 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 23:16:42,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:42,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827216278] [2022-01-31 23:16:42,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1827216278] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:42,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:42,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 23:16:42,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014630706] [2022-01-31 23:16:42,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:42,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 23:16:42,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:42,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 23:16:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 23:16:42,880 INFO L87 Difference]: Start difference. First operand 483 states and 601 transitions. Second operand has 120 states, 120 states have (on average 3.95) internal successors, (474), 119 states have internal predecessors, (474), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:46,751 INFO L93 Difference]: Finished difference Result 1087 states and 1443 transitions. [2022-01-31 23:16:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 23:16:46,751 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 3.95) internal successors, (474), 119 states have internal predecessors, (474), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 478 [2022-01-31 23:16:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:46,753 INFO L225 Difference]: With dead ends: 1087 [2022-01-31 23:16:46,753 INFO L226 Difference]: Without dead ends: 1075 [2022-01-31 23:16:46,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7143, Invalid=7377, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 23:16:46,754 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 2213 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2330 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:46,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2330 Valid, 826 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:16:46,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-01-31 23:16:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 487. [2022-01-31 23:16:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 481 states have (on average 1.2494802494802495) internal successors, (601), 481 states have internal predecessors, (601), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:16:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 606 transitions. [2022-01-31 23:16:46,766 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 606 transitions. Word has length 478 [2022-01-31 23:16:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:46,766 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 606 transitions. [2022-01-31 23:16:46,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 3.95) internal successors, (474), 119 states have internal predecessors, (474), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 606 transitions. [2022-01-31 23:16:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-01-31 23:16:46,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:46,768 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:46,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 23:16:46,768 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:46,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:46,768 INFO L85 PathProgramCache]: Analyzing trace with hash -467721868, now seen corresponding path program 117 times [2022-01-31 23:16:46,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:46,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043382540] [2022-01-31 23:16:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:46,772 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:16:46,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:46,913 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:51,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:16:51,291 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:51,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043382540] [2022-01-31 23:16:51,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1043382540] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:51,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:51,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 23:16:51,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157173842] [2022-01-31 23:16:51,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:51,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 23:16:51,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 23:16:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 23:16:51,295 INFO L87 Difference]: Start difference. First operand 487 states and 606 transitions. Second operand has 121 states, 121 states have (on average 3.950413223140496) internal successors, (478), 120 states have internal predecessors, (478), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:55,534 INFO L93 Difference]: Finished difference Result 1096 states and 1455 transitions. [2022-01-31 23:16:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 23:16:55,535 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.950413223140496) internal successors, (478), 120 states have internal predecessors, (478), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 482 [2022-01-31 23:16:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:55,536 INFO L225 Difference]: With dead ends: 1096 [2022-01-31 23:16:55,536 INFO L226 Difference]: Without dead ends: 1084 [2022-01-31 23:16:55,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7263, Invalid=7499, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 23:16:55,538 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 2518 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2636 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:55,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2636 Valid, 829 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:16:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-01-31 23:16:55,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 491. [2022-01-31 23:16:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 485 states have (on average 1.2494845360824742) internal successors, (606), 485 states have internal predecessors, (606), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:16:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 611 transitions. [2022-01-31 23:16:55,550 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 611 transitions. Word has length 482 [2022-01-31 23:16:55,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:55,550 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 611 transitions. [2022-01-31 23:16:55,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.950413223140496) internal successors, (478), 120 states have internal predecessors, (478), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 611 transitions. [2022-01-31 23:16:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-01-31 23:16:55,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:55,552 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:55,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 23:16:55,553 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1979930919, now seen corresponding path program 118 times [2022-01-31 23:16:55,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564233601] [2022-01-31 23:16:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:55,557 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:16:55,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:55,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:00,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:17:00,239 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564233601] [2022-01-31 23:17:00,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [564233601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:00,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:00,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 23:17:00,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61514371] [2022-01-31 23:17:00,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:00,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 23:17:00,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:00,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 23:17:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 23:17:00,249 INFO L87 Difference]: Start difference. First operand 491 states and 611 transitions. Second operand has 122 states, 122 states have (on average 3.9508196721311477) internal successors, (482), 121 states have internal predecessors, (482), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:04,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:04,420 INFO L93 Difference]: Finished difference Result 1105 states and 1467 transitions. [2022-01-31 23:17:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 23:17:04,421 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.9508196721311477) internal successors, (482), 121 states have internal predecessors, (482), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 486 [2022-01-31 23:17:04,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:04,422 INFO L225 Difference]: With dead ends: 1105 [2022-01-31 23:17:04,422 INFO L226 Difference]: Without dead ends: 1093 [2022-01-31 23:17:04,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7384, Invalid=7622, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 23:17:04,423 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 2841 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 1155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2960 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1155 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:04,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2960 Valid, 821 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1155 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:17:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-01-31 23:17:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 495. [2022-01-31 23:17:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 489 states have (on average 1.2494887525562373) internal successors, (611), 489 states have internal predecessors, (611), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:17:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 616 transitions. [2022-01-31 23:17:04,435 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 616 transitions. Word has length 486 [2022-01-31 23:17:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:04,435 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 616 transitions. [2022-01-31 23:17:04,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.9508196721311477) internal successors, (482), 121 states have internal predecessors, (482), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 616 transitions. [2022-01-31 23:17:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2022-01-31 23:17:04,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:04,437 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:04,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 23:17:04,437 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1360982462, now seen corresponding path program 119 times [2022-01-31 23:17:04,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:04,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768575189] [2022-01-31 23:17:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:04,441 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:17:04,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:04,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:09,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:17:09,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:09,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768575189] [2022-01-31 23:17:09,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [768575189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:09,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:09,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 23:17:09,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94693373] [2022-01-31 23:17:09,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:09,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 23:17:09,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 23:17:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 23:17:09,135 INFO L87 Difference]: Start difference. First operand 495 states and 616 transitions. Second operand has 123 states, 123 states have (on average 3.951219512195122) internal successors, (486), 122 states have internal predecessors, (486), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:13,547 INFO L93 Difference]: Finished difference Result 1114 states and 1479 transitions. [2022-01-31 23:17:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 23:17:13,547 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 3.951219512195122) internal successors, (486), 122 states have internal predecessors, (486), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 490 [2022-01-31 23:17:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:13,549 INFO L225 Difference]: With dead ends: 1114 [2022-01-31 23:17:13,549 INFO L226 Difference]: Without dead ends: 1102 [2022-01-31 23:17:13,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7506, Invalid=7746, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 23:17:13,550 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 2377 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:13,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2497 Valid, 862 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:17:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-01-31 23:17:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 499. [2022-01-31 23:17:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 493 states have (on average 1.2494929006085194) internal successors, (616), 493 states have internal predecessors, (616), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:17:13,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 621 transitions. [2022-01-31 23:17:13,563 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 621 transitions. Word has length 490 [2022-01-31 23:17:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:13,563 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 621 transitions. [2022-01-31 23:17:13,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 3.951219512195122) internal successors, (486), 122 states have internal predecessors, (486), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 621 transitions. [2022-01-31 23:17:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-01-31 23:17:13,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:13,565 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:13,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 23:17:13,566 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash -693681629, now seen corresponding path program 120 times [2022-01-31 23:17:13,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:13,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278848671] [2022-01-31 23:17:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:13,569 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:17:13,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:13,682 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:18,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:17:18,250 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:18,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278848671] [2022-01-31 23:17:18,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [278848671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:18,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:18,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 23:17:18,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38727869] [2022-01-31 23:17:18,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:18,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 23:17:18,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 23:17:18,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 23:17:18,254 INFO L87 Difference]: Start difference. First operand 499 states and 621 transitions. Second operand has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 123 states have internal predecessors, (490), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:22,826 INFO L93 Difference]: Finished difference Result 1123 states and 1491 transitions. [2022-01-31 23:17:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 23:17:22,827 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 123 states have internal predecessors, (490), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 494 [2022-01-31 23:17:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:22,828 INFO L225 Difference]: With dead ends: 1123 [2022-01-31 23:17:22,828 INFO L226 Difference]: Without dead ends: 1111 [2022-01-31 23:17:22,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7629, Invalid=7871, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 23:17:22,829 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 2501 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2622 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:22,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2622 Valid, 868 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:17:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-31 23:17:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 503. [2022-01-31 23:17:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 497 states have (on average 1.2494969818913482) internal successors, (621), 497 states have internal predecessors, (621), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:17:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 626 transitions. [2022-01-31 23:17:22,841 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 626 transitions. Word has length 494 [2022-01-31 23:17:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:22,841 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 626 transitions. [2022-01-31 23:17:22,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 123 states have internal predecessors, (490), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 626 transitions. [2022-01-31 23:17:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-01-31 23:17:22,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:22,843 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:22,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 23:17:22,844 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash -988358648, now seen corresponding path program 121 times [2022-01-31 23:17:22,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:22,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862265402] [2022-01-31 23:17:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:22,847 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:17:22,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:22,963 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:17:27,647 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:27,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862265402] [2022-01-31 23:17:27,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1862265402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:27,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:27,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 23:17:27,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764039512] [2022-01-31 23:17:27,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:27,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 23:17:27,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:27,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 23:17:27,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 23:17:27,651 INFO L87 Difference]: Start difference. First operand 503 states and 626 transitions. Second operand has 125 states, 125 states have (on average 3.952) internal successors, (494), 124 states have internal predecessors, (494), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:32,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:32,083 INFO L93 Difference]: Finished difference Result 1132 states and 1503 transitions. [2022-01-31 23:17:32,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 23:17:32,083 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 3.952) internal successors, (494), 124 states have internal predecessors, (494), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 498 [2022-01-31 23:17:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:32,085 INFO L225 Difference]: With dead ends: 1132 [2022-01-31 23:17:32,085 INFO L226 Difference]: Without dead ends: 1120 [2022-01-31 23:17:32,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7753, Invalid=7997, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 23:17:32,086 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 3026 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3148 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:32,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3148 Valid, 833 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1232 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:17:32,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-01-31 23:17:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 507. [2022-01-31 23:17:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 501 states have (on average 1.249500998003992) internal successors, (626), 501 states have internal predecessors, (626), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:17:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 631 transitions. [2022-01-31 23:17:32,099 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 631 transitions. Word has length 498 [2022-01-31 23:17:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:32,100 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 631 transitions. [2022-01-31 23:17:32,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 3.952) internal successors, (494), 124 states have internal predecessors, (494), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:32,100 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 631 transitions. [2022-01-31 23:17:32,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-01-31 23:17:32,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:32,102 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:32,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 23:17:32,102 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:32,102 INFO L85 PathProgramCache]: Analyzing trace with hash 609153901, now seen corresponding path program 122 times [2022-01-31 23:17:32,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:32,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112880575] [2022-01-31 23:17:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:32,105 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:17:32,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:32,232 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:36,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:17:36,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:36,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112880575] [2022-01-31 23:17:36,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112880575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:36,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:36,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 23:17:36,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338241053] [2022-01-31 23:17:36,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:36,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 23:17:36,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:36,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 23:17:36,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 23:17:36,986 INFO L87 Difference]: Start difference. First operand 507 states and 631 transitions. Second operand has 126 states, 126 states have (on average 3.9523809523809526) internal successors, (498), 125 states have internal predecessors, (498), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:41,682 INFO L93 Difference]: Finished difference Result 1141 states and 1515 transitions. [2022-01-31 23:17:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 23:17:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.9523809523809526) internal successors, (498), 125 states have internal predecessors, (498), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 502 [2022-01-31 23:17:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:41,684 INFO L225 Difference]: With dead ends: 1141 [2022-01-31 23:17:41,684 INFO L226 Difference]: Without dead ends: 1129 [2022-01-31 23:17:41,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7878, Invalid=8124, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 23:17:41,685 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 2514 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2637 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:41,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2637 Valid, 879 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [984 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:17:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-01-31 23:17:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 511. [2022-01-31 23:17:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 505 states have (on average 1.2495049504950495) internal successors, (631), 505 states have internal predecessors, (631), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:17:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 636 transitions. [2022-01-31 23:17:41,697 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 636 transitions. Word has length 502 [2022-01-31 23:17:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:41,697 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 636 transitions. [2022-01-31 23:17:41,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.9523809523809526) internal successors, (498), 125 states have internal predecessors, (498), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 636 transitions. [2022-01-31 23:17:41,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2022-01-31 23:17:41,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:41,699 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:41,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 23:17:41,699 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:41,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:41,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1450126254, now seen corresponding path program 123 times [2022-01-31 23:17:41,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:41,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714839590] [2022-01-31 23:17:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:41,703 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:17:41,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:41,813 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:17:46,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:46,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714839590] [2022-01-31 23:17:46,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1714839590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:46,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:46,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 23:17:46,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264960402] [2022-01-31 23:17:46,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:46,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 23:17:46,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 23:17:46,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 23:17:46,854 INFO L87 Difference]: Start difference. First operand 511 states and 636 transitions. Second operand has 127 states, 127 states have (on average 3.952755905511811) internal successors, (502), 126 states have internal predecessors, (502), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:51,475 INFO L93 Difference]: Finished difference Result 1150 states and 1527 transitions. [2022-01-31 23:17:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 23:17:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.952755905511811) internal successors, (502), 126 states have internal predecessors, (502), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 506 [2022-01-31 23:17:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:51,477 INFO L225 Difference]: With dead ends: 1150 [2022-01-31 23:17:51,477 INFO L226 Difference]: Without dead ends: 1138 [2022-01-31 23:17:51,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=8004, Invalid=8252, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 23:17:51,478 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 2837 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 1141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2961 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1141 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:51,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2961 Valid, 884 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1141 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:17:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-01-31 23:17:51,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 515. [2022-01-31 23:17:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 509 states have (on average 1.2495088408644401) internal successors, (636), 509 states have internal predecessors, (636), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:17:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 641 transitions. [2022-01-31 23:17:51,490 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 641 transitions. Word has length 506 [2022-01-31 23:17:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:51,490 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 641 transitions. [2022-01-31 23:17:51,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.952755905511811) internal successors, (502), 126 states have internal predecessors, (502), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:51,491 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 641 transitions. [2022-01-31 23:17:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-01-31 23:17:51,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:51,493 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:51,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 23:17:51,493 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:51,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:51,493 INFO L85 PathProgramCache]: Analyzing trace with hash 125680311, now seen corresponding path program 124 times [2022-01-31 23:17:51,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:51,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035950088] [2022-01-31 23:17:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:51,496 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:17:51,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:51,613 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:56,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:17:56,731 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035950088] [2022-01-31 23:17:56,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1035950088] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:56,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:56,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 23:17:56,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537180790] [2022-01-31 23:17:56,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:56,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 23:17:56,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:56,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 23:17:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 23:17:56,735 INFO L87 Difference]: Start difference. First operand 515 states and 641 transitions. Second operand has 128 states, 128 states have (on average 3.953125) internal successors, (506), 127 states have internal predecessors, (506), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:01,815 INFO L93 Difference]: Finished difference Result 1159 states and 1539 transitions. [2022-01-31 23:18:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 23:18:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.953125) internal successors, (506), 127 states have internal predecessors, (506), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 510 [2022-01-31 23:18:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:01,817 INFO L225 Difference]: With dead ends: 1159 [2022-01-31 23:18:01,817 INFO L226 Difference]: Without dead ends: 1147 [2022-01-31 23:18:01,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8131, Invalid=8381, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 23:18:01,818 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 2501 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 972 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 972 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:01,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2626 Valid, 898 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [972 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:18:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-01-31 23:18:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 519. [2022-01-31 23:18:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 513 states have (on average 1.2495126705653021) internal successors, (641), 513 states have internal predecessors, (641), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:18:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 646 transitions. [2022-01-31 23:18:01,831 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 646 transitions. Word has length 510 [2022-01-31 23:18:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:01,831 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 646 transitions. [2022-01-31 23:18:01,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.953125) internal successors, (506), 127 states have internal predecessors, (506), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 646 transitions. [2022-01-31 23:18:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2022-01-31 23:18:01,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:01,833 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:01,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 23:18:01,834 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:01,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1041688220, now seen corresponding path program 125 times [2022-01-31 23:18:01,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:01,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110945049] [2022-01-31 23:18:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:01,839 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:18:01,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:01,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:07,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:18:07,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:07,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110945049] [2022-01-31 23:18:07,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1110945049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:07,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:07,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 23:18:07,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169223426] [2022-01-31 23:18:07,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:07,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 23:18:07,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:07,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 23:18:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 23:18:07,053 INFO L87 Difference]: Start difference. First operand 519 states and 646 transitions. Second operand has 129 states, 129 states have (on average 3.953488372093023) internal successors, (510), 128 states have internal predecessors, (510), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:12,313 INFO L93 Difference]: Finished difference Result 1168 states and 1551 transitions. [2022-01-31 23:18:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 23:18:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.953488372093023) internal successors, (510), 128 states have internal predecessors, (510), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 514 [2022-01-31 23:18:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:12,315 INFO L225 Difference]: With dead ends: 1168 [2022-01-31 23:18:12,315 INFO L226 Difference]: Without dead ends: 1156 [2022-01-31 23:18:12,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=8259, Invalid=8511, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 23:18:12,316 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 2895 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3021 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:12,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3021 Valid, 866 Invalid, 2570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:18:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-01-31 23:18:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 523. [2022-01-31 23:18:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 517 states have (on average 1.2495164410058026) internal successors, (646), 517 states have internal predecessors, (646), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:18:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 651 transitions. [2022-01-31 23:18:12,329 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 651 transitions. Word has length 514 [2022-01-31 23:18:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:12,329 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 651 transitions. [2022-01-31 23:18:12,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.953488372093023) internal successors, (510), 128 states have internal predecessors, (510), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 651 transitions. [2022-01-31 23:18:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-01-31 23:18:12,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:12,332 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:12,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 23:18:12,334 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:12,335 INFO L85 PathProgramCache]: Analyzing trace with hash -356673535, now seen corresponding path program 126 times [2022-01-31 23:18:12,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:12,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962774998] [2022-01-31 23:18:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:12,340 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:18:12,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:12,459 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:17,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:18:17,589 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:17,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962774998] [2022-01-31 23:18:17,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [962774998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:17,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:17,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 23:18:17,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326883362] [2022-01-31 23:18:17,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:17,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 23:18:17,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:17,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 23:18:17,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 23:18:17,593 INFO L87 Difference]: Start difference. First operand 523 states and 651 transitions. Second operand has 130 states, 130 states have (on average 3.953846153846154) internal successors, (514), 129 states have internal predecessors, (514), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:22,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:22,791 INFO L93 Difference]: Finished difference Result 1177 states and 1563 transitions. [2022-01-31 23:18:22,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 23:18:22,792 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 3.953846153846154) internal successors, (514), 129 states have internal predecessors, (514), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 518 [2022-01-31 23:18:22,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:22,794 INFO L225 Difference]: With dead ends: 1177 [2022-01-31 23:18:22,794 INFO L226 Difference]: Without dead ends: 1165 [2022-01-31 23:18:22,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=8388, Invalid=8642, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 23:18:22,797 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2488 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2615 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:22,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2615 Valid, 908 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:18:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-01-31 23:18:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 527. [2022-01-31 23:18:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 521 states have (on average 1.2495201535508638) internal successors, (651), 521 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:18:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 656 transitions. [2022-01-31 23:18:22,819 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 656 transitions. Word has length 518 [2022-01-31 23:18:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:22,820 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 656 transitions. [2022-01-31 23:18:22,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 3.953846153846154) internal successors, (514), 129 states have internal predecessors, (514), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 656 transitions. [2022-01-31 23:18:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-01-31 23:18:22,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:22,822 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:22,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 23:18:22,824 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:22,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1741484314, now seen corresponding path program 127 times [2022-01-31 23:18:22,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:22,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445427926] [2022-01-31 23:18:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:22,833 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:18:22,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:22,951 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:28,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:18:28,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:28,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445427926] [2022-01-31 23:18:28,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [445427926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:28,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:28,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 23:18:28,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448010793] [2022-01-31 23:18:28,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:28,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 23:18:28,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:28,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 23:18:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 23:18:28,376 INFO L87 Difference]: Start difference. First operand 527 states and 656 transitions. Second operand has 131 states, 131 states have (on average 3.954198473282443) internal successors, (518), 130 states have internal predecessors, (518), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:33,054 INFO L93 Difference]: Finished difference Result 1186 states and 1575 transitions. [2022-01-31 23:18:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 23:18:33,054 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.954198473282443) internal successors, (518), 130 states have internal predecessors, (518), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 522 [2022-01-31 23:18:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:33,056 INFO L225 Difference]: With dead ends: 1186 [2022-01-31 23:18:33,056 INFO L226 Difference]: Without dead ends: 1174 [2022-01-31 23:18:33,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8518, Invalid=8774, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 23:18:33,057 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 2618 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 1026 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2746 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1026 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:33,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2746 Valid, 920 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1026 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:18:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-01-31 23:18:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 531. [2022-01-31 23:18:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 525 states have (on average 1.2495238095238095) internal successors, (656), 525 states have internal predecessors, (656), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:18:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 661 transitions. [2022-01-31 23:18:33,070 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 661 transitions. Word has length 522 [2022-01-31 23:18:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:33,070 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 661 transitions. [2022-01-31 23:18:33,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.954198473282443) internal successors, (518), 130 states have internal predecessors, (518), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 661 transitions. [2022-01-31 23:18:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-01-31 23:18:33,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:33,073 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:33,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 23:18:33,073 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:33,073 INFO L85 PathProgramCache]: Analyzing trace with hash 244878155, now seen corresponding path program 128 times [2022-01-31 23:18:33,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:33,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020425420] [2022-01-31 23:18:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:33,077 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:18:33,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:33,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:38,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:38,582 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 23:18:38,582 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:38,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020425420] [2022-01-31 23:18:38,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2020425420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:38,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:38,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 23:18:38,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042335668] [2022-01-31 23:18:38,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:38,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 23:18:38,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 23:18:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 23:18:38,585 INFO L87 Difference]: Start difference. First operand 531 states and 661 transitions. Second operand has 132 states, 132 states have (on average 3.9545454545454546) internal successors, (522), 131 states have internal predecessors, (522), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:43,879 INFO L93 Difference]: Finished difference Result 1195 states and 1587 transitions. [2022-01-31 23:18:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 23:18:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.9545454545454546) internal successors, (522), 131 states have internal predecessors, (522), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 526 [2022-01-31 23:18:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:43,882 INFO L225 Difference]: With dead ends: 1195 [2022-01-31 23:18:43,882 INFO L226 Difference]: Without dead ends: 1183 [2022-01-31 23:18:43,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8649, Invalid=8907, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 23:18:43,883 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 3127 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 1267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3256 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1267 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:43,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3256 Valid, 875 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1267 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:18:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-01-31 23:18:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 535. [2022-01-31 23:18:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 529 states have (on average 1.2495274102079394) internal successors, (661), 529 states have internal predecessors, (661), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:18:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 666 transitions. [2022-01-31 23:18:43,896 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 666 transitions. Word has length 526 [2022-01-31 23:18:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:43,897 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 666 transitions. [2022-01-31 23:18:43,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.9545454545454546) internal successors, (522), 131 states have internal predecessors, (522), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 666 transitions. [2022-01-31 23:18:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-31 23:18:43,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:43,899 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:43,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 23:18:43,899 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1552986832, now seen corresponding path program 129 times [2022-01-31 23:18:43,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:43,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606413626] [2022-01-31 23:18:43,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:43,919 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:18:43,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:44,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:49,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:18:49,462 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:49,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606413626] [2022-01-31 23:18:49,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1606413626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:49,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:49,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 23:18:49,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986751725] [2022-01-31 23:18:49,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:49,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 23:18:49,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:49,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 23:18:49,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 23:18:49,467 INFO L87 Difference]: Start difference. First operand 535 states and 666 transitions. Second operand has 133 states, 133 states have (on average 3.954887218045113) internal successors, (526), 132 states have internal predecessors, (526), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:55,399 INFO L93 Difference]: Finished difference Result 1204 states and 1599 transitions. [2022-01-31 23:18:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 23:18:55,400 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.954887218045113) internal successors, (526), 132 states have internal predecessors, (526), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 530 [2022-01-31 23:18:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:55,401 INFO L225 Difference]: With dead ends: 1204 [2022-01-31 23:18:55,401 INFO L226 Difference]: Without dead ends: 1192 [2022-01-31 23:18:55,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8781, Invalid=9041, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 23:18:55,403 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 2851 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2981 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:55,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2981 Valid, 917 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:18:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-01-31 23:18:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 539. [2022-01-31 23:18:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 533 states have (on average 1.24953095684803) internal successors, (666), 533 states have internal predecessors, (666), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:18:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 671 transitions. [2022-01-31 23:18:55,416 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 671 transitions. Word has length 530 [2022-01-31 23:18:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:55,416 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 671 transitions. [2022-01-31 23:18:55,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.954887218045113) internal successors, (526), 132 states have internal predecessors, (526), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 671 transitions. [2022-01-31 23:18:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2022-01-31 23:18:55,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:55,418 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:55,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 23:18:55,419 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:55,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:55,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1986489195, now seen corresponding path program 130 times [2022-01-31 23:18:55,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:55,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140221256] [2022-01-31 23:18:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:55,422 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:18:55,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:55,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:01,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:19:01,142 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:01,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140221256] [2022-01-31 23:19:01,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140221256] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:01,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:01,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 23:19:01,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165204949] [2022-01-31 23:19:01,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:01,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 23:19:01,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:01,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 23:19:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 23:19:01,146 INFO L87 Difference]: Start difference. First operand 539 states and 671 transitions. Second operand has 134 states, 134 states have (on average 3.955223880597015) internal successors, (530), 133 states have internal predecessors, (530), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:06,996 INFO L93 Difference]: Finished difference Result 1213 states and 1611 transitions. [2022-01-31 23:19:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 23:19:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 3.955223880597015) internal successors, (530), 133 states have internal predecessors, (530), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 534 [2022-01-31 23:19:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:06,998 INFO L225 Difference]: With dead ends: 1213 [2022-01-31 23:19:06,998 INFO L226 Difference]: Without dead ends: 1201 [2022-01-31 23:19:06,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8914, Invalid=9176, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 23:19:06,999 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 3182 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 1292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3313 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:06,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3313 Valid, 886 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1292 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:19:07,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-01-31 23:19:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 543. [2022-01-31 23:19:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 537 states have (on average 1.2495344506517692) internal successors, (671), 537 states have internal predecessors, (671), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:19:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 676 transitions. [2022-01-31 23:19:07,015 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 676 transitions. Word has length 534 [2022-01-31 23:19:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:07,015 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 676 transitions. [2022-01-31 23:19:07,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 3.955223880597015) internal successors, (530), 133 states have internal predecessors, (530), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 676 transitions. [2022-01-31 23:19:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2022-01-31 23:19:07,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:07,020 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:07,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 23:19:07,020 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash 559260026, now seen corresponding path program 131 times [2022-01-31 23:19:07,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:07,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135274784] [2022-01-31 23:19:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:07,024 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:19:07,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:07,244 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:12,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:19:12,766 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:12,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135274784] [2022-01-31 23:19:12,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [135274784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:12,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:12,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 23:19:12,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038201957] [2022-01-31 23:19:12,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:12,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 23:19:12,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:12,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 23:19:12,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 23:19:12,771 INFO L87 Difference]: Start difference. First operand 543 states and 676 transitions. Second operand has 135 states, 135 states have (on average 3.9555555555555557) internal successors, (534), 134 states have internal predecessors, (534), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:18,488 INFO L93 Difference]: Finished difference Result 1222 states and 1623 transitions. [2022-01-31 23:19:18,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 23:19:18,488 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.9555555555555557) internal successors, (534), 134 states have internal predecessors, (534), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 538 [2022-01-31 23:19:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:18,490 INFO L225 Difference]: With dead ends: 1222 [2022-01-31 23:19:18,490 INFO L226 Difference]: Without dead ends: 1210 [2022-01-31 23:19:18,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9048, Invalid=9312, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 23:19:18,491 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 2859 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2991 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:18,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2991 Valid, 911 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1129 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:19:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-01-31 23:19:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 547. [2022-01-31 23:19:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 541 states have (on average 1.2495378927911276) internal successors, (676), 541 states have internal predecessors, (676), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:19:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 681 transitions. [2022-01-31 23:19:18,505 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 681 transitions. Word has length 538 [2022-01-31 23:19:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:18,505 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 681 transitions. [2022-01-31 23:19:18,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.9555555555555557) internal successors, (534), 134 states have internal predecessors, (534), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 681 transitions. [2022-01-31 23:19:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-01-31 23:19:18,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:18,508 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:18,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 23:19:18,508 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1212658655, now seen corresponding path program 132 times [2022-01-31 23:19:18,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:18,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861972120] [2022-01-31 23:19:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:18,511 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:19:18,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:18,651 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:19:24,274 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:24,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861972120] [2022-01-31 23:19:24,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861972120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:24,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:24,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 23:19:24,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940937738] [2022-01-31 23:19:24,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:24,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 23:19:24,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:24,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 23:19:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 23:19:24,279 INFO L87 Difference]: Start difference. First operand 547 states and 681 transitions. Second operand has 136 states, 136 states have (on average 3.9558823529411766) internal successors, (538), 135 states have internal predecessors, (538), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:30,396 INFO L93 Difference]: Finished difference Result 1231 states and 1635 transitions. [2022-01-31 23:19:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 23:19:30,397 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.9558823529411766) internal successors, (538), 135 states have internal predecessors, (538), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 542 [2022-01-31 23:19:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:30,398 INFO L225 Difference]: With dead ends: 1231 [2022-01-31 23:19:30,398 INFO L226 Difference]: Without dead ends: 1219 [2022-01-31 23:19:30,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=9183, Invalid=9449, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 23:19:30,399 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 2964 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 1183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3097 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 2682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1183 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:30,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3097 Valid, 935 Invalid, 2682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1183 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:19:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-01-31 23:19:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 551. [2022-01-31 23:19:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 545 states have (on average 1.2495412844036697) internal successors, (681), 545 states have internal predecessors, (681), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:19:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 686 transitions. [2022-01-31 23:19:30,413 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 686 transitions. Word has length 542 [2022-01-31 23:19:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:30,413 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 686 transitions. [2022-01-31 23:19:30,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.9558823529411766) internal successors, (538), 135 states have internal predecessors, (538), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 686 transitions. [2022-01-31 23:19:30,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2022-01-31 23:19:30,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:30,415 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:30,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 23:19:30,416 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:30,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1452274748, now seen corresponding path program 133 times [2022-01-31 23:19:30,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:30,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646109095] [2022-01-31 23:19:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:30,419 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:19:30,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:30,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:36,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:19:36,234 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:36,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646109095] [2022-01-31 23:19:36,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1646109095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:36,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:36,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 23:19:36,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873840100] [2022-01-31 23:19:36,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:36,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 23:19:36,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 23:19:36,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 23:19:36,240 INFO L87 Difference]: Start difference. First operand 551 states and 686 transitions. Second operand has 137 states, 137 states have (on average 3.9562043795620436) internal successors, (542), 136 states have internal predecessors, (542), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:42,429 INFO L93 Difference]: Finished difference Result 1240 states and 1647 transitions. [2022-01-31 23:19:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 23:19:42,430 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 3.9562043795620436) internal successors, (542), 136 states have internal predecessors, (542), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 546 [2022-01-31 23:19:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:42,432 INFO L225 Difference]: With dead ends: 1240 [2022-01-31 23:19:42,432 INFO L226 Difference]: Without dead ends: 1228 [2022-01-31 23:19:42,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=9319, Invalid=9587, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 23:19:42,433 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 3391 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 1389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1389 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:42,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3525 Valid, 934 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1389 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:19:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-01-31 23:19:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 555. [2022-01-31 23:19:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 549 states have (on average 1.2495446265938068) internal successors, (686), 549 states have internal predecessors, (686), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:19:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 691 transitions. [2022-01-31 23:19:42,449 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 691 transitions. Word has length 546 [2022-01-31 23:19:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:42,449 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 691 transitions. [2022-01-31 23:19:42,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 3.9562043795620436) internal successors, (542), 136 states have internal predecessors, (542), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 691 transitions. [2022-01-31 23:19:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2022-01-31 23:19:42,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:42,452 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:42,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 23:19:42,452 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash 221243689, now seen corresponding path program 134 times [2022-01-31 23:19:42,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:42,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231601544] [2022-01-31 23:19:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:42,466 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:19:42,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:42,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:48,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:19:48,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:48,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231601544] [2022-01-31 23:19:48,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [231601544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:48,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:48,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 23:19:48,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431952940] [2022-01-31 23:19:48,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:48,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 23:19:48,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 23:19:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 23:19:48,470 INFO L87 Difference]: Start difference. First operand 555 states and 691 transitions. Second operand has 138 states, 138 states have (on average 3.9565217391304346) internal successors, (546), 137 states have internal predecessors, (546), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:54,626 INFO L93 Difference]: Finished difference Result 1249 states and 1659 transitions. [2022-01-31 23:19:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 23:19:54,627 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 3.9565217391304346) internal successors, (546), 137 states have internal predecessors, (546), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 550 [2022-01-31 23:19:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:54,628 INFO L225 Difference]: With dead ends: 1249 [2022-01-31 23:19:54,628 INFO L226 Difference]: Without dead ends: 1237 [2022-01-31 23:19:54,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9456, Invalid=9726, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 23:19:54,629 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 2863 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2998 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 2569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:54,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2998 Valid, 940 Invalid, 2569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:19:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-01-31 23:19:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 559. [2022-01-31 23:19:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 553 states have (on average 1.2495479204339963) internal successors, (691), 553 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:19:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 696 transitions. [2022-01-31 23:19:54,643 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 696 transitions. Word has length 550 [2022-01-31 23:19:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:54,644 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 696 transitions. [2022-01-31 23:19:54,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 3.9565217391304346) internal successors, (546), 137 states have internal predecessors, (546), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 696 transitions. [2022-01-31 23:19:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-01-31 23:19:54,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:54,646 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:54,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 23:19:54,646 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1454863346, now seen corresponding path program 135 times [2022-01-31 23:19:54,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:54,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899347740] [2022-01-31 23:19:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:54,661 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:19:54,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:54,809 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:00,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:20:00,611 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:00,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899347740] [2022-01-31 23:20:00,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [899347740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:00,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:00,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 23:20:00,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188737375] [2022-01-31 23:20:00,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:00,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 23:20:00,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 23:20:00,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 23:20:00,616 INFO L87 Difference]: Start difference. First operand 559 states and 696 transitions. Second operand has 139 states, 139 states have (on average 3.9568345323741005) internal successors, (550), 138 states have internal predecessors, (550), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:20:06,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:06,910 INFO L93 Difference]: Finished difference Result 1258 states and 1671 transitions. [2022-01-31 23:20:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 23:20:06,911 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 3.9568345323741005) internal successors, (550), 138 states have internal predecessors, (550), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 554 [2022-01-31 23:20:06,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:06,913 INFO L225 Difference]: With dead ends: 1258 [2022-01-31 23:20:06,913 INFO L226 Difference]: Without dead ends: 1246 [2022-01-31 23:20:06,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9594, Invalid=9866, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 23:20:06,914 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 3456 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 1410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3592 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1410 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:06,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3592 Valid, 931 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1410 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:20:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-01-31 23:20:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 563. [2022-01-31 23:20:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 557 states have (on average 1.2495511669658887) internal successors, (696), 557 states have internal predecessors, (696), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:20:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 701 transitions. [2022-01-31 23:20:06,928 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 701 transitions. Word has length 554 [2022-01-31 23:20:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:06,928 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 701 transitions. [2022-01-31 23:20:06,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 3.9568345323741005) internal successors, (550), 138 states have internal predecessors, (550), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:20:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 701 transitions. [2022-01-31 23:20:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-01-31 23:20:06,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:06,931 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:06,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 23:20:06,931 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:06,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1893414003, now seen corresponding path program 136 times [2022-01-31 23:20:06,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:06,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372132522] [2022-01-31 23:20:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:06,935 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:20:06,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:07,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:13,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:20:13,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:13,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372132522] [2022-01-31 23:20:13,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1372132522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:13,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:13,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 23:20:13,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392495597] [2022-01-31 23:20:13,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:13,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 23:20:13,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:13,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 23:20:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 23:20:13,160 INFO L87 Difference]: Start difference. First operand 563 states and 701 transitions. Second operand has 140 states, 140 states have (on average 3.9571428571428573) internal successors, (554), 139 states have internal predecessors, (554), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:20:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:19,846 INFO L93 Difference]: Finished difference Result 1267 states and 1683 transitions. [2022-01-31 23:20:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 23:20:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 3.9571428571428573) internal successors, (554), 139 states have internal predecessors, (554), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 558 [2022-01-31 23:20:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:19,848 INFO L225 Difference]: With dead ends: 1267 [2022-01-31 23:20:19,849 INFO L226 Difference]: Without dead ends: 1255 [2022-01-31 23:20:19,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9733, Invalid=10007, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 23:20:19,850 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 2825 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 1096 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2962 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1096 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:19,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2962 Valid, 945 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1096 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:20:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2022-01-31 23:20:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 567. [2022-01-31 23:20:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 561 states have (on average 1.249554367201426) internal successors, (701), 561 states have internal predecessors, (701), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:20:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 706 transitions. [2022-01-31 23:20:19,864 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 706 transitions. Word has length 558 [2022-01-31 23:20:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:19,864 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 706 transitions. [2022-01-31 23:20:19,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 3.9571428571428573) internal successors, (554), 139 states have internal predecessors, (554), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:20:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 706 transitions. [2022-01-31 23:20:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2022-01-31 23:20:19,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:19,867 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:19,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 23:20:19,867 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:19,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1684611672, now seen corresponding path program 137 times [2022-01-31 23:20:19,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:19,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055054641] [2022-01-31 23:20:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:19,870 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:20:19,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:20,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:26,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:26,172 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 23:20:26,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:26,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055054641] [2022-01-31 23:20:26,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1055054641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:26,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:26,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 23:20:26,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785686068] [2022-01-31 23:20:26,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:26,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 23:20:26,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:26,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 23:20:26,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 23:20:26,178 INFO L87 Difference]: Start difference. First operand 567 states and 706 transitions. Second operand has 141 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 140 states have internal predecessors, (558), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:20:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:33,052 INFO L93 Difference]: Finished difference Result 1276 states and 1695 transitions. [2022-01-31 23:20:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 23:20:33,052 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 140 states have internal predecessors, (558), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 562 [2022-01-31 23:20:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:33,054 INFO L225 Difference]: With dead ends: 1276 [2022-01-31 23:20:33,054 INFO L226 Difference]: Without dead ends: 1264 [2022-01-31 23:20:33,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9873, Invalid=10149, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 23:20:33,056 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 2611 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2749 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:33,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2749 Valid, 958 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:20:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-01-31 23:20:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 571. [2022-01-31 23:20:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 565 states have (on average 1.2495575221238937) internal successors, (706), 565 states have internal predecessors, (706), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:20:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 711 transitions. [2022-01-31 23:20:33,071 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 711 transitions. Word has length 562 [2022-01-31 23:20:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:33,071 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 711 transitions. [2022-01-31 23:20:33,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 140 states have internal predecessors, (558), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:20:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 711 transitions. [2022-01-31 23:20:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2022-01-31 23:20:33,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:33,074 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:33,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 23:20:33,074 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:33,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:33,074 INFO L85 PathProgramCache]: Analyzing trace with hash -506227267, now seen corresponding path program 138 times [2022-01-31 23:20:33,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:33,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407431982] [2022-01-31 23:20:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:33,077 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:20:33,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:33,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:39,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:20:39,712 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:39,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407431982] [2022-01-31 23:20:39,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1407431982] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:39,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:39,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 23:20:39,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855040672] [2022-01-31 23:20:39,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:39,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 23:20:39,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:39,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 23:20:39,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 23:20:39,716 INFO L87 Difference]: Start difference. First operand 571 states and 711 transitions. Second operand has 142 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 141 states have internal predecessors, (562), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:20:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:47,121 INFO L93 Difference]: Finished difference Result 1285 states and 1707 transitions. [2022-01-31 23:20:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 23:20:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 141 states have internal predecessors, (562), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 566 [2022-01-31 23:20:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:47,124 INFO L225 Difference]: With dead ends: 1285 [2022-01-31 23:20:47,124 INFO L226 Difference]: Without dead ends: 1273 [2022-01-31 23:20:47,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=10014, Invalid=10292, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 23:20:47,125 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 2848 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 1113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2987 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1113 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:47,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2987 Valid, 981 Invalid, 2738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1113 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:20:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-01-31 23:20:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 575. [2022-01-31 23:20:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 569 states have (on average 1.249560632688928) internal successors, (711), 569 states have internal predecessors, (711), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:20:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 716 transitions. [2022-01-31 23:20:47,140 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 716 transitions. Word has length 566 [2022-01-31 23:20:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:47,140 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 716 transitions. [2022-01-31 23:20:47,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 141 states have internal predecessors, (562), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:20:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 716 transitions. [2022-01-31 23:20:47,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2022-01-31 23:20:47,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:47,143 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:47,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 23:20:47,143 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:47,143 INFO L85 PathProgramCache]: Analyzing trace with hash -195309918, now seen corresponding path program 139 times [2022-01-31 23:20:47,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:47,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695379530] [2022-01-31 23:20:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:47,149 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:20:47,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:47,344 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:53,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:20:53,738 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:53,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695379530] [2022-01-31 23:20:53,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [695379530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:53,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:53,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 23:20:53,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649732950] [2022-01-31 23:20:53,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:53,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 23:20:53,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 23:20:53,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 23:20:53,744 INFO L87 Difference]: Start difference. First operand 575 states and 716 transitions. Second operand has 143 states, 143 states have (on average 3.958041958041958) internal successors, (566), 142 states have internal predecessors, (566), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:21:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:01,683 INFO L93 Difference]: Finished difference Result 1294 states and 1719 transitions. [2022-01-31 23:21:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 23:21:01,684 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 3.958041958041958) internal successors, (566), 142 states have internal predecessors, (566), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 570 [2022-01-31 23:21:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:01,686 INFO L225 Difference]: With dead ends: 1294 [2022-01-31 23:21:01,686 INFO L226 Difference]: Without dead ends: 1282 [2022-01-31 23:21:01,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=10156, Invalid=10436, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 23:21:01,687 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 3452 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 1412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3592 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1412 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:01,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3592 Valid, 975 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1412 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:21:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-01-31 23:21:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 579. [2022-01-31 23:21:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 573 states have (on average 1.24956369982548) internal successors, (716), 573 states have internal predecessors, (716), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:21:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 721 transitions. [2022-01-31 23:21:01,702 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 721 transitions. Word has length 570 [2022-01-31 23:21:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:01,702 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 721 transitions. [2022-01-31 23:21:01,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 3.958041958041958) internal successors, (566), 142 states have internal predecessors, (566), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:21:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 721 transitions. [2022-01-31 23:21:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-01-31 23:21:01,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:01,705 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:01,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 23:21:01,705 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:01,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1532818169, now seen corresponding path program 140 times [2022-01-31 23:21:01,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:01,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807625608] [2022-01-31 23:21:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:01,709 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:21:01,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:01,925 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:08,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:21:08,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:08,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807625608] [2022-01-31 23:21:08,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1807625608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:08,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:08,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 23:21:08,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660731299] [2022-01-31 23:21:08,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:08,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 23:21:08,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:08,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 23:21:08,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 23:21:08,739 INFO L87 Difference]: Start difference. First operand 579 states and 721 transitions. Second operand has 144 states, 144 states have (on average 3.9583333333333335) internal successors, (570), 143 states have internal predecessors, (570), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:21:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:16,444 INFO L93 Difference]: Finished difference Result 1303 states and 1731 transitions. [2022-01-31 23:21:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 23:21:16,444 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 3.9583333333333335) internal successors, (570), 143 states have internal predecessors, (570), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 574 [2022-01-31 23:21:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:16,446 INFO L225 Difference]: With dead ends: 1303 [2022-01-31 23:21:16,446 INFO L226 Difference]: Without dead ends: 1291 [2022-01-31 23:21:16,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10299, Invalid=10581, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 23:21:16,447 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 2754 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 1068 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2895 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1068 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:16,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2895 Valid, 997 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1068 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:21:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-01-31 23:21:16,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 583. [2022-01-31 23:21:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 577 states have (on average 1.2495667244367417) internal successors, (721), 577 states have internal predecessors, (721), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:21:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 726 transitions. [2022-01-31 23:21:16,463 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 726 transitions. Word has length 574 [2022-01-31 23:21:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:16,463 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 726 transitions. [2022-01-31 23:21:16,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 3.9583333333333335) internal successors, (570), 143 states have internal predecessors, (570), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:21:16,463 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 726 transitions. [2022-01-31 23:21:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2022-01-31 23:21:16,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:16,465 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:16,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 23:21:16,466 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:16,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1219137772, now seen corresponding path program 141 times [2022-01-31 23:21:16,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:16,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019362563] [2022-01-31 23:21:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:16,474 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:21:16,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:16,642 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:23,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:21:23,352 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:23,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019362563] [2022-01-31 23:21:23,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1019362563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:23,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:23,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 23:21:23,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985038431] [2022-01-31 23:21:23,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:23,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 23:21:23,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 23:21:23,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 23:21:23,357 INFO L87 Difference]: Start difference. First operand 583 states and 726 transitions. Second operand has 145 states, 145 states have (on average 3.9586206896551723) internal successors, (574), 144 states have internal predecessors, (574), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:21:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:31,174 INFO L93 Difference]: Finished difference Result 1312 states and 1743 transitions. [2022-01-31 23:21:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 23:21:31,174 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 3.9586206896551723) internal successors, (574), 144 states have internal predecessors, (574), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 578 [2022-01-31 23:21:31,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:31,176 INFO L225 Difference]: With dead ends: 1312 [2022-01-31 23:21:31,176 INFO L226 Difference]: Without dead ends: 1300 [2022-01-31 23:21:31,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10443, Invalid=10727, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 23:21:31,177 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 3628 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 1490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3770 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1490 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:31,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3770 Valid, 979 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1490 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:21:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-01-31 23:21:31,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 587. [2022-01-31 23:21:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 581 states have (on average 1.2495697074010328) internal successors, (726), 581 states have internal predecessors, (726), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:21:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 731 transitions. [2022-01-31 23:21:31,194 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 731 transitions. Word has length 578 [2022-01-31 23:21:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:31,194 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 731 transitions. [2022-01-31 23:21:31,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 3.9586206896551723) internal successors, (574), 144 states have internal predecessors, (574), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:21:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 731 transitions. [2022-01-31 23:21:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-01-31 23:21:31,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:31,197 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:31,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 23:21:31,197 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash -741107119, now seen corresponding path program 142 times [2022-01-31 23:21:31,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:31,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643889319] [2022-01-31 23:21:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:31,201 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:21:31,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:31,362 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:38,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:21:38,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:38,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643889319] [2022-01-31 23:21:38,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1643889319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:38,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:38,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 23:21:38,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427279028] [2022-01-31 23:21:38,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:38,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 23:21:38,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:38,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 23:21:38,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 23:21:38,057 INFO L87 Difference]: Start difference. First operand 587 states and 731 transitions. Second operand has 146 states, 146 states have (on average 3.958904109589041) internal successors, (578), 145 states have internal predecessors, (578), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:21:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:45,823 INFO L93 Difference]: Finished difference Result 1321 states and 1755 transitions. [2022-01-31 23:21:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 23:21:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.958904109589041) internal successors, (578), 145 states have internal predecessors, (578), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 582 [2022-01-31 23:21:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:45,826 INFO L225 Difference]: With dead ends: 1321 [2022-01-31 23:21:45,826 INFO L226 Difference]: Without dead ends: 1309 [2022-01-31 23:21:45,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10588, Invalid=10874, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 23:21:45,827 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 3271 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 1310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3414 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1310 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:45,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3414 Valid, 987 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1310 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:21:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-01-31 23:21:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 591. [2022-01-31 23:21:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 585 states have (on average 1.2495726495726496) internal successors, (731), 585 states have internal predecessors, (731), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:21:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 736 transitions. [2022-01-31 23:21:45,849 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 736 transitions. Word has length 582 [2022-01-31 23:21:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:45,849 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 736 transitions. [2022-01-31 23:21:45,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.958904109589041) internal successors, (578), 145 states have internal predecessors, (578), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:21:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 736 transitions. [2022-01-31 23:21:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-01-31 23:21:45,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:45,852 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 143, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:45,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 23:21:45,852 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:45,852 INFO L85 PathProgramCache]: Analyzing trace with hash 652175670, now seen corresponding path program 143 times [2022-01-31 23:21:45,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:45,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508405100] [2022-01-31 23:21:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:45,856 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:21:45,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:46,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:52,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:21:52,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:52,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508405100] [2022-01-31 23:21:52,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [508405100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:52,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:52,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 23:21:52,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992836995] [2022-01-31 23:21:52,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:52,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 23:21:52,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:52,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 23:21:52,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 23:21:52,951 INFO L87 Difference]: Start difference. First operand 591 states and 736 transitions. Second operand has 147 states, 147 states have (on average 3.9591836734693877) internal successors, (582), 146 states have internal predecessors, (582), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:22:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:00,606 INFO L93 Difference]: Finished difference Result 1330 states and 1767 transitions. [2022-01-31 23:22:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 23:22:00,607 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 3.9591836734693877) internal successors, (582), 146 states have internal predecessors, (582), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 586 [2022-01-31 23:22:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:00,609 INFO L225 Difference]: With dead ends: 1330 [2022-01-31 23:22:00,609 INFO L226 Difference]: Without dead ends: 1318 [2022-01-31 23:22:00,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10734, Invalid=11022, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 23:22:00,610 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 2987 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 1162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3131 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 2763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1162 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:00,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3131 Valid, 1014 Invalid, 2763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1162 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:22:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-01-31 23:22:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 595. [2022-01-31 23:22:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 589 states have (on average 1.2495755517826825) internal successors, (736), 589 states have internal predecessors, (736), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:22:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 741 transitions. [2022-01-31 23:22:00,627 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 741 transitions. Word has length 586 [2022-01-31 23:22:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:00,628 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 741 transitions. [2022-01-31 23:22:00,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 3.9591836734693877) internal successors, (582), 146 states have internal predecessors, (582), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:22:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 741 transitions. [2022-01-31 23:22:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2022-01-31 23:22:00,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:00,630 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 144, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:00,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 23:22:00,631 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1609514395, now seen corresponding path program 144 times [2022-01-31 23:22:00,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:00,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409386876] [2022-01-31 23:22:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:00,634 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:22:00,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:00,822 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:07,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:07,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:07,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409386876] [2022-01-31 23:22:07,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [409386876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:07,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:07,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 23:22:07,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138633431] [2022-01-31 23:22:07,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:07,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 23:22:07,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:07,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 23:22:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 23:22:07,798 INFO L87 Difference]: Start difference. First operand 595 states and 741 transitions. Second operand has 148 states, 148 states have (on average 3.9594594594594597) internal successors, (586), 147 states have internal predecessors, (586), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:22:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:15,866 INFO L93 Difference]: Finished difference Result 1339 states and 1779 transitions. [2022-01-31 23:22:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 23:22:15,867 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 3.9594594594594597) internal successors, (586), 147 states have internal predecessors, (586), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 590 [2022-01-31 23:22:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:15,868 INFO L225 Difference]: With dead ends: 1339 [2022-01-31 23:22:15,869 INFO L226 Difference]: Without dead ends: 1327 [2022-01-31 23:22:15,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=10881, Invalid=11171, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 23:22:15,870 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 3430 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 1382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3575 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1382 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:15,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3575 Valid, 1029 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1382 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:22:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-01-31 23:22:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 599. [2022-01-31 23:22:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 593 states have (on average 1.2495784148397977) internal successors, (741), 593 states have internal predecessors, (741), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:22:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 746 transitions. [2022-01-31 23:22:15,886 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 746 transitions. Word has length 590 [2022-01-31 23:22:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:15,886 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 746 transitions. [2022-01-31 23:22:15,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 3.9594594594594597) internal successors, (586), 147 states have internal predecessors, (586), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:22:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 746 transitions. [2022-01-31 23:22:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2022-01-31 23:22:15,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:15,889 INFO L514 BasicCegarLoop]: trace histogram [145, 145, 145, 145, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:15,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 23:22:15,889 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash 713316224, now seen corresponding path program 145 times [2022-01-31 23:22:15,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:15,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90704312] [2022-01-31 23:22:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:15,902 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:22:15,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:16,082 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:23,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:23,293 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:23,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90704312] [2022-01-31 23:22:23,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [90704312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:23,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:23,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 23:22:23,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044463708] [2022-01-31 23:22:23,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:23,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 23:22:23,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:23,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 23:22:23,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 23:22:23,297 INFO L87 Difference]: Start difference. First operand 599 states and 746 transitions. Second operand has 149 states, 149 states have (on average 3.959731543624161) internal successors, (590), 148 states have internal predecessors, (590), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:22:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:30,898 INFO L93 Difference]: Finished difference Result 1348 states and 1791 transitions. [2022-01-31 23:22:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 23:22:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 3.959731543624161) internal successors, (590), 148 states have internal predecessors, (590), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 594 [2022-01-31 23:22:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:30,900 INFO L225 Difference]: With dead ends: 1348 [2022-01-31 23:22:30,900 INFO L226 Difference]: Without dead ends: 1336 [2022-01-31 23:22:30,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=11029, Invalid=11321, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 23:22:30,901 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 3077 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 1202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3223 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1202 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:30,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3223 Valid, 1041 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1202 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:22:30,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-01-31 23:22:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 603. [2022-01-31 23:22:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 597 states have (on average 1.2495812395309882) internal successors, (746), 597 states have internal predecessors, (746), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:22:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 751 transitions. [2022-01-31 23:22:30,917 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 751 transitions. Word has length 594 [2022-01-31 23:22:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:30,917 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 751 transitions. [2022-01-31 23:22:30,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 3.959731543624161) internal successors, (590), 148 states have internal predecessors, (590), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:22:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 751 transitions. [2022-01-31 23:22:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-01-31 23:22:30,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:30,920 INFO L514 BasicCegarLoop]: trace histogram [146, 146, 146, 146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:30,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 23:22:30,920 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:30,921 INFO L85 PathProgramCache]: Analyzing trace with hash 260044517, now seen corresponding path program 146 times [2022-01-31 23:22:30,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:30,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235250566] [2022-01-31 23:22:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:30,924 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:22:30,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:31,094 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:38,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:38,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235250566] [2022-01-31 23:22:38,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235250566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:38,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:38,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 23:22:38,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309115020] [2022-01-31 23:22:38,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:38,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 23:22:38,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 23:22:38,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 23:22:38,539 INFO L87 Difference]: Start difference. First operand 603 states and 751 transitions. Second operand has 150 states, 150 states have (on average 3.96) internal successors, (594), 149 states have internal predecessors, (594), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:22:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:47,094 INFO L93 Difference]: Finished difference Result 1357 states and 1803 transitions. [2022-01-31 23:22:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 23:22:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 3.96) internal successors, (594), 149 states have internal predecessors, (594), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 598 [2022-01-31 23:22:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:47,097 INFO L225 Difference]: With dead ends: 1357 [2022-01-31 23:22:47,097 INFO L226 Difference]: Without dead ends: 1345 [2022-01-31 23:22:47,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=11178, Invalid=11472, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 23:22:47,098 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 2989 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 1159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3136 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1159 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:47,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3136 Valid, 1027 Invalid, 2933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1159 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:22:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-01-31 23:22:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 607. [2022-01-31 23:22:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 601 states have (on average 1.2495840266222962) internal successors, (751), 601 states have internal predecessors, (751), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:22:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 756 transitions. [2022-01-31 23:22:47,115 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 756 transitions. Word has length 598 [2022-01-31 23:22:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:47,115 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 756 transitions. [2022-01-31 23:22:47,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 3.96) internal successors, (594), 149 states have internal predecessors, (594), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:22:47,115 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 756 transitions. [2022-01-31 23:22:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2022-01-31 23:22:47,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:47,118 INFO L514 BasicCegarLoop]: trace histogram [147, 147, 147, 147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:47,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 23:22:47,118 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:47,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:47,118 INFO L85 PathProgramCache]: Analyzing trace with hash -987538486, now seen corresponding path program 147 times [2022-01-31 23:22:47,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:47,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632202872] [2022-01-31 23:22:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:47,121 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:22:47,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:47,289 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:54,471 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:54,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632202872] [2022-01-31 23:22:54,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [632202872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:54,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:54,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 23:22:54,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722571785] [2022-01-31 23:22:54,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:54,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 23:22:54,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:54,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 23:22:54,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 23:22:54,477 INFO L87 Difference]: Start difference. First operand 607 states and 756 transitions. Second operand has 151 states, 151 states have (on average 3.9602649006622515) internal successors, (598), 150 states have internal predecessors, (598), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:23:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:23:03,434 INFO L93 Difference]: Finished difference Result 1366 states and 1815 transitions. [2022-01-31 23:23:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 23:23:03,435 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 3.9602649006622515) internal successors, (598), 150 states have internal predecessors, (598), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 602 [2022-01-31 23:23:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:23:03,437 INFO L225 Difference]: With dead ends: 1366 [2022-01-31 23:23:03,437 INFO L226 Difference]: Without dead ends: 1354 [2022-01-31 23:23:03,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=11328, Invalid=11624, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 23:23:03,439 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 3504 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 1405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3652 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1405 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:23:03,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3652 Valid, 1008 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1405 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:23:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-01-31 23:23:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 611. [2022-01-31 23:23:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 605 states have (on average 1.2495867768595041) internal successors, (756), 605 states have internal predecessors, (756), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:23:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 761 transitions. [2022-01-31 23:23:03,455 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 761 transitions. Word has length 602 [2022-01-31 23:23:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:23:03,456 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 761 transitions. [2022-01-31 23:23:03,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 3.9602649006622515) internal successors, (598), 150 states have internal predecessors, (598), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:23:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 761 transitions. [2022-01-31 23:23:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2022-01-31 23:23:03,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:23:03,458 INFO L514 BasicCegarLoop]: trace histogram [148, 148, 148, 148, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:23:03,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 23:23:03,459 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:23:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:23:03,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2131740207, now seen corresponding path program 148 times [2022-01-31 23:23:03,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:23:03,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688594300] [2022-01-31 23:23:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:23:03,462 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:23:03,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:23:03,640 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:23:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:10,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:23:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:23:10,730 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:23:10,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688594300] [2022-01-31 23:23:10,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [688594300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:23:10,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:23:10,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-01-31 23:23:10,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341323479] [2022-01-31 23:23:10,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:23:10,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 23:23:10,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:23:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 23:23:10,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 23:23:10,737 INFO L87 Difference]: Start difference. First operand 611 states and 761 transitions. Second operand has 152 states, 152 states have (on average 3.960526315789474) internal successors, (602), 151 states have internal predecessors, (602), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)