/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/loops/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 03:38:15,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 03:38:15,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 03:38:15,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 03:38:15,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 03:38:15,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 03:38:15,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 03:38:15,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 03:38:15,136 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 03:38:15,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 03:38:15,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 03:38:15,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 03:38:15,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 03:38:15,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 03:38:15,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 03:38:15,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 03:38:15,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 03:38:15,138 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 03:38:15,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 03:38:15,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 03:38:15,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 03:38:15,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 03:38:15,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 03:38:15,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:38:15,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 03:38:15,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 03:38:15,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 03:38:15,139 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 03:38:15,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 03:38:15,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 03:38:15,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 03:38:15,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 03:38:15,493 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 03:38:15,495 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 03:38:15,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-02-15 03:38:15,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffa82ecdb/c714d764178d429abf6ba6d6ccd15811/FLAGee3e97cbc [2022-02-15 03:38:15,853 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 03:38:15,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-02-15 03:38:15,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffa82ecdb/c714d764178d429abf6ba6d6ccd15811/FLAGee3e97cbc [2022-02-15 03:38:16,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffa82ecdb/c714d764178d429abf6ba6d6ccd15811 [2022-02-15 03:38:16,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 03:38:16,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 03:38:16,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 03:38:16,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 03:38:16,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 03:38:16,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30b7742c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16, skipping insertion in model container [2022-02-15 03:38:16,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 03:38:16,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 03:38:16,460 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-02-15 03:38:16,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:38:16,511 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 03:38:16,526 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-02-15 03:38:16,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:38:16,552 INFO L208 MainTranslator]: Completed translation [2022-02-15 03:38:16,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16 WrapperNode [2022-02-15 03:38:16,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 03:38:16,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 03:38:16,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 03:38:16,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 03:38:16,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 03:38:16,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 03:38:16,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 03:38:16,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 03:38:16,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:38:16,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 03:38:16,666 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) [2022-02-15 03:38:16,713 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 [2022-02-15 03:38:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 03:38:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 03:38:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 03:38:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 03:38:16,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 03:38:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 03:38:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 03:38:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 03:38:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 03:38:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 03:38:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 03:38:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 03:38:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 03:38:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 03:38:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 03:38:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 03:38:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 03:38:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 03:38:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 03:38:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 03:38:16,888 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 03:38:16,889 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 03:38:17,162 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 03:38:17,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 03:38:17,168 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-15 03:38:17,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:38:17 BoogieIcfgContainer [2022-02-15 03:38:17,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 03:38:17,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 03:38:17,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 03:38:17,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 03:38:17,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 03:38:16" (1/3) ... [2022-02-15 03:38:17,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d88c365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:38:17, skipping insertion in model container [2022-02-15 03:38:17,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16" (2/3) ... [2022-02-15 03:38:17,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d88c365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:38:17, skipping insertion in model container [2022-02-15 03:38:17,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:38:17" (3/3) ... [2022-02-15 03:38:17,199 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2022-02-15 03:38:17,204 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 03:38:17,204 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 03:38:17,248 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 03:38:17,253 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 [2022-02-15 03:38:17,254 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 03:38:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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) [2022-02-15 03:38:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 03:38:17,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:17,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:17,273 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:17,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:17,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1914549692, now seen corresponding path program 1 times [2022-02-15 03:38:17,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:17,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140915552] [2022-02-15 03:38:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:17,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:17,348 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:17,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:17,507 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:17,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140915552] [2022-02-15 03:38:17,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140915552] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:17,509 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:17,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 03:38:17,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693872115] [2022-02-15 03:38:17,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:17,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 03:38:17,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 03:38:17,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 03:38:17,543 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:17,600 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-02-15 03:38:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 03:38:17,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-15 03:38:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:17,606 INFO L225 Difference]: With dead ends: 54 [2022-02-15 03:38:17,607 INFO L226 Difference]: Without dead ends: 26 [2022-02-15 03:38:17,609 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 [2022-02-15 03:38:17,613 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:17,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 03:38:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-15 03:38:17,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-15 03:38:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-02-15 03:38:17,645 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-02-15 03:38:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:17,646 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-02-15 03:38:17,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-02-15 03:38:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 03:38:17,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:17,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:17,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 03:38:17,648 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash 314290466, now seen corresponding path program 1 times [2022-02-15 03:38:17,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:17,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255537722] [2022-02-15 03:38:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:17,653 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:17,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:17,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:17,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255537722] [2022-02-15 03:38:17,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [255537722] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:17,818 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:17,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 03:38:17,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715730089] [2022-02-15 03:38:17,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:17,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 03:38:17,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:17,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 03:38:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 03:38:17,822 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:17,973 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-02-15 03:38:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:38:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-15 03:38:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:17,976 INFO L225 Difference]: With dead ends: 49 [2022-02-15 03:38:17,976 INFO L226 Difference]: Without dead ends: 28 [2022-02-15 03:38:17,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:38:17,978 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:17,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-15 03:38:17,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-15 03:38:17,984 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) [2022-02-15 03:38:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-15 03:38:17,985 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-02-15 03:38:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:17,985 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-15 03:38:17,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-15 03:38:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 03:38:17,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:17,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:17,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 03:38:17,987 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash 408725728, now seen corresponding path program 1 times [2022-02-15 03:38:17,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:17,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669240968] [2022-02-15 03:38:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:18,002 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:18,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:18,007 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:18,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:18,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:18,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669240968] [2022-02-15 03:38:18,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [669240968] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:18,124 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:18,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:38:18,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185103564] [2022-02-15 03:38:18,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:18,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:38:18,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:38:18,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:38:18,126 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:18,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:18,250 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-02-15 03:38:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:38:18,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-15 03:38:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:18,251 INFO L225 Difference]: With dead ends: 57 [2022-02-15 03:38:18,251 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 03:38:18,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:38:18,252 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:18,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 03:38:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-02-15 03:38:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-02-15 03:38:18,259 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2022-02-15 03:38:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:18,259 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-02-15 03:38:18,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-02-15 03:38:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 03:38:18,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:18,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:18,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 03:38:18,261 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1080556849, now seen corresponding path program 1 times [2022-02-15 03:38:18,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:18,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559324830] [2022-02-15 03:38:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:18,264 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:18,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:18,265 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:18,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:18,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:18,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559324830] [2022-02-15 03:38:18,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559324830] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:18,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:18,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:38:18,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780937453] [2022-02-15 03:38:18,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:18,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:38:18,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:38:18,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:38:18,649 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:19,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:19,161 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-02-15 03:38:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:38:19,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 03:38:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:19,164 INFO L225 Difference]: With dead ends: 65 [2022-02-15 03:38:19,165 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 03:38:19,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 03:38:19,166 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:19,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 51 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:38:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 03:38:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2022-02-15 03:38:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-02-15 03:38:19,176 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-02-15 03:38:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:19,177 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-02-15 03:38:19,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-02-15 03:38:19,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 03:38:19,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:19,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:19,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 03:38:19,178 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1781621427, now seen corresponding path program 1 times [2022-02-15 03:38:19,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:19,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439309375] [2022-02-15 03:38:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:19,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:19,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:19,181 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:19,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:19,266 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:19,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439309375] [2022-02-15 03:38:19,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1439309375] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:19,266 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:19,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 03:38:19,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062841063] [2022-02-15 03:38:19,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:19,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 03:38:19,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:19,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 03:38:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 03:38:19,268 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:19,337 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-02-15 03:38:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 03:38:19,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 03:38:19,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:19,339 INFO L225 Difference]: With dead ends: 82 [2022-02-15 03:38:19,339 INFO L226 Difference]: Without dead ends: 51 [2022-02-15 03:38:19,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:19,341 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:19,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 03:38:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-15 03:38:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-02-15 03:38:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-02-15 03:38:19,349 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-02-15 03:38:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:19,349 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-02-15 03:38:19,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:19,349 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-02-15 03:38:19,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 03:38:19,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:19,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:19,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 03:38:19,350 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:19,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1755898038, now seen corresponding path program 1 times [2022-02-15 03:38:19,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:19,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187923417] [2022-02-15 03:38:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:19,352 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:19,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:19,353 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:19,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:19,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187923417] [2022-02-15 03:38:19,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1187923417] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:19,751 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:19,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:38:19,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417181950] [2022-02-15 03:38:19,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:19,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:38:19,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:19,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:38:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:38:19,753 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:20,296 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2022-02-15 03:38:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:38:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 03:38:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:20,297 INFO L225 Difference]: With dead ends: 111 [2022-02-15 03:38:20,297 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 03:38:20,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 03:38:20,298 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:20,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 75 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 03:38:20,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2022-02-15 03:38:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-02-15 03:38:20,310 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 28 [2022-02-15 03:38:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:20,310 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-02-15 03:38:20,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-02-15 03:38:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 03:38:20,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:20,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:20,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 03:38:20,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash -990333180, now seen corresponding path program 2 times [2022-02-15 03:38:20,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:20,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786011762] [2022-02-15 03:38:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:20,331 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:20,332 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:20,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:20,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:20,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786011762] [2022-02-15 03:38:20,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [786011762] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:20,467 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:20,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:38:20,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180000834] [2022-02-15 03:38:20,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:20,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:38:20,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:20,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:38:20,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:20,468 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:20,804 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2022-02-15 03:38:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:38:20,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 03:38:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:20,806 INFO L225 Difference]: With dead ends: 125 [2022-02-15 03:38:20,806 INFO L226 Difference]: Without dead ends: 91 [2022-02-15 03:38:20,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:38:20,807 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:20,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 55 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:38:20,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-15 03:38:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-02-15 03:38:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-02-15 03:38:20,850 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 31 [2022-02-15 03:38:20,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:20,850 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-02-15 03:38:20,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-02-15 03:38:20,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 03:38:20,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:20,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:20,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 03:38:20,851 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash -405243253, now seen corresponding path program 1 times [2022-02-15 03:38:20,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:20,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545820207] [2022-02-15 03:38:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:20,853 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:20,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:20,854 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:20,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:20,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 03:38:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:20,965 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:20,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545820207] [2022-02-15 03:38:20,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545820207] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:20,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:20,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:38:20,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86255857] [2022-02-15 03:38:20,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:20,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:38:20,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:38:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:20,967 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:21,179 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-02-15 03:38:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:38:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-15 03:38:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:21,180 INFO L225 Difference]: With dead ends: 100 [2022-02-15 03:38:21,180 INFO L226 Difference]: Without dead ends: 73 [2022-02-15 03:38:21,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:38:21,181 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 87 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:21,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 54 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-15 03:38:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2022-02-15 03:38:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-02-15 03:38:21,206 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 33 [2022-02-15 03:38:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:21,206 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-02-15 03:38:21,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-02-15 03:38:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 03:38:21,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:21,207 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 03:38:21,208 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1306424002, now seen corresponding path program 3 times [2022-02-15 03:38:21,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:21,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675514975] [2022-02-15 03:38:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:21,210 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:21,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:21,210 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:21,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:21,549 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:21,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675514975] [2022-02-15 03:38:21,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675514975] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:21,549 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:21,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:38:21,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189464234] [2022-02-15 03:38:21,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:21,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:38:21,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:21,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:38:21,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:38:21,550 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:22,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:22,126 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2022-02-15 03:38:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 03:38:22,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 03:38:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:22,128 INFO L225 Difference]: With dead ends: 111 [2022-02-15 03:38:22,128 INFO L226 Difference]: Without dead ends: 109 [2022-02-15 03:38:22,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=1206, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 03:38:22,129 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:22,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 61 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:38:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-15 03:38:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 65. [2022-02-15 03:38:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 58 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-02-15 03:38:22,144 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 33 [2022-02-15 03:38:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:22,144 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-02-15 03:38:22,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-02-15 03:38:22,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 03:38:22,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:22,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:22,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 03:38:22,146 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:22,146 INFO L85 PathProgramCache]: Analyzing trace with hash -350564349, now seen corresponding path program 1 times [2022-02-15 03:38:22,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:22,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879460870] [2022-02-15 03:38:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:22,148 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:22,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:22,149 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:22,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:22,382 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:22,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879460870] [2022-02-15 03:38:22,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1879460870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:22,382 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:22,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:38:22,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777451761] [2022-02-15 03:38:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:22,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:38:22,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:38:22,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:38:22,384 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:23,119 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2022-02-15 03:38:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 03:38:23,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 03:38:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:23,121 INFO L225 Difference]: With dead ends: 158 [2022-02-15 03:38:23,121 INFO L226 Difference]: Without dead ends: 156 [2022-02-15 03:38:23,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 03:38:23,122 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 189 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:23,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 51 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-15 03:38:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 76. [2022-02-15 03:38:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 69 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2022-02-15 03:38:23,141 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 36 [2022-02-15 03:38:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:23,141 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2022-02-15 03:38:23,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2022-02-15 03:38:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 03:38:23,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:23,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:23,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 03:38:23,142 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:23,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1169352267, now seen corresponding path program 2 times [2022-02-15 03:38:23,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:23,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370019435] [2022-02-15 03:38:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:23,145 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:23,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:23,146 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:23,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:23,571 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:23,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370019435] [2022-02-15 03:38:23,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [370019435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:23,572 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:23,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 03:38:23,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601008151] [2022-02-15 03:38:23,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:23,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 03:38:23,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:23,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 03:38:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:38:23,573 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:24,249 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2022-02-15 03:38:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:38:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 03:38:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:24,250 INFO L225 Difference]: With dead ends: 170 [2022-02-15 03:38:24,250 INFO L226 Difference]: Without dead ends: 132 [2022-02-15 03:38:24,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 03:38:24,252 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 116 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:24,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 74 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-15 03:38:24,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 87. [2022-02-15 03:38:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 80 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2022-02-15 03:38:24,272 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 36 [2022-02-15 03:38:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:24,272 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2022-02-15 03:38:24,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2022-02-15 03:38:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 03:38:24,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:24,273 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:24,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 03:38:24,273 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:24,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:24,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1855259691, now seen corresponding path program 4 times [2022-02-15 03:38:24,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:24,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468301752] [2022-02-15 03:38:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:24,275 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:24,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:24,276 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:24,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:24,426 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:24,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468301752] [2022-02-15 03:38:24,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [468301752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:24,426 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:24,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:38:24,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426602447] [2022-02-15 03:38:24,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:24,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:38:24,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:38:24,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:38:24,427 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:25,020 INFO L93 Difference]: Finished difference Result 232 states and 306 transitions. [2022-02-15 03:38:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:38:25,020 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-15 03:38:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:25,022 INFO L225 Difference]: With dead ends: 232 [2022-02-15 03:38:25,022 INFO L226 Difference]: Without dead ends: 192 [2022-02-15 03:38:25,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:38:25,023 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 165 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:25,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 71 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-15 03:38:25,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 135. [2022-02-15 03:38:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 177 transitions. [2022-02-15 03:38:25,128 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 177 transitions. Word has length 39 [2022-02-15 03:38:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:25,128 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 177 transitions. [2022-02-15 03:38:25,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 177 transitions. [2022-02-15 03:38:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 03:38:25,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:25,133 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:25,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 03:38:25,133 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1631396062, now seen corresponding path program 2 times [2022-02-15 03:38:25,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:25,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035003657] [2022-02-15 03:38:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:25,148 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:25,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:25,149 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:25,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:25,238 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:25,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035003657] [2022-02-15 03:38:25,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1035003657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:25,238 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:25,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:38:25,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568124761] [2022-02-15 03:38:25,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:25,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:38:25,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:38:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:25,239 INFO L87 Difference]: Start difference. First operand 135 states and 177 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:25,579 INFO L93 Difference]: Finished difference Result 221 states and 286 transitions. [2022-02-15 03:38:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 03:38:25,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-15 03:38:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:25,580 INFO L225 Difference]: With dead ends: 221 [2022-02-15 03:38:25,581 INFO L226 Difference]: Without dead ends: 154 [2022-02-15 03:38:25,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:38:25,581 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:25,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 52 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:38:25,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-15 03:38:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 103. [2022-02-15 03:38:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 95 states have (on average 1.231578947368421) internal successors, (117), 96 states have internal predecessors, (117), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2022-02-15 03:38:25,617 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 39 [2022-02-15 03:38:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:25,618 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2022-02-15 03:38:25,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2022-02-15 03:38:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 03:38:25,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:25,618 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:25,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 03:38:25,619 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash -930331484, now seen corresponding path program 3 times [2022-02-15 03:38:25,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:25,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132955706] [2022-02-15 03:38:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:25,620 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:25,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:25,621 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:26,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:26,036 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:26,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132955706] [2022-02-15 03:38:26,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1132955706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:26,036 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:26,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 03:38:26,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276385608] [2022-02-15 03:38:26,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:26,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 03:38:26,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 03:38:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:38:26,037 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:27,511 INFO L93 Difference]: Finished difference Result 236 states and 286 transitions. [2022-02-15 03:38:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 03:38:27,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-15 03:38:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:27,513 INFO L225 Difference]: With dead ends: 236 [2022-02-15 03:38:27,513 INFO L226 Difference]: Without dead ends: 196 [2022-02-15 03:38:27,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=538, Invalid=3002, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 03:38:27,515 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 133 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:27,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 76 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-15 03:38:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 99. [2022-02-15 03:38:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 92 states have internal predecessors, (110), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-02-15 03:38:27,558 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 39 [2022-02-15 03:38:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:27,559 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-02-15 03:38:27,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-02-15 03:38:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 03:38:27,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:27,560 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:27,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 03:38:27,560 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:27,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1624035100, now seen corresponding path program 2 times [2022-02-15 03:38:27,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:27,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122575142] [2022-02-15 03:38:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:27,562 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:27,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:27,563 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:27,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:27,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 03:38:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:27,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:27,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122575142] [2022-02-15 03:38:27,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122575142] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:27,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:27,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:38:27,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748276167] [2022-02-15 03:38:27,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:27,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:38:27,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:27,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:38:27,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:38:27,770 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:28,299 INFO L93 Difference]: Finished difference Result 141 states and 167 transitions. [2022-02-15 03:38:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 03:38:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-02-15 03:38:28,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:28,302 INFO L225 Difference]: With dead ends: 141 [2022-02-15 03:38:28,302 INFO L226 Difference]: Without dead ends: 139 [2022-02-15 03:38:28,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:38:28,305 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 113 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:28,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 82 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-15 03:38:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2022-02-15 03:38:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 110 states have internal predecessors, (129), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 03:38:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2022-02-15 03:38:28,348 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 41 [2022-02-15 03:38:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:28,348 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2022-02-15 03:38:28,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2022-02-15 03:38:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 03:38:28,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:28,350 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:28,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 03:38:28,350 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1831868819, now seen corresponding path program 5 times [2022-02-15 03:38:28,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:28,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795079144] [2022-02-15 03:38:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:28,357 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:28,358 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:28,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:28,861 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:28,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795079144] [2022-02-15 03:38:28,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1795079144] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:28,861 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:28,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:38:28,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066268606] [2022-02-15 03:38:28,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:28,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:38:28,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:28,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:38:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:38:28,862 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:29,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:29,678 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2022-02-15 03:38:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 03:38:29,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 03:38:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:29,680 INFO L225 Difference]: With dead ends: 180 [2022-02-15 03:38:29,680 INFO L226 Difference]: Without dead ends: 178 [2022-02-15 03:38:29,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 03:38:29,681 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 195 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:29,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 57 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-15 03:38:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2022-02-15 03:38:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 133 states have internal predecessors, (155), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2022-02-15 03:38:29,791 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 41 [2022-02-15 03:38:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:29,791 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2022-02-15 03:38:29,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2022-02-15 03:38:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 03:38:29,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:29,792 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:29,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 03:38:29,792 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:29,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2084807843, now seen corresponding path program 1 times [2022-02-15 03:38:29,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:29,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824797758] [2022-02-15 03:38:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:29,794 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:29,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:29,796 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:30,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:30,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 03:38:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:30,113 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:30,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824797758] [2022-02-15 03:38:30,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [824797758] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:30,113 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:30,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:38:30,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91363317] [2022-02-15 03:38:30,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:30,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:38:30,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:30,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:38:30,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:38:30,115 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:30,874 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2022-02-15 03:38:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 03:38:30,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-02-15 03:38:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:30,878 INFO L225 Difference]: With dead ends: 186 [2022-02-15 03:38:30,878 INFO L226 Difference]: Without dead ends: 184 [2022-02-15 03:38:30,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=1507, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:38:30,883 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 117 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:30,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 79 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:30,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-15 03:38:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 146. [2022-02-15 03:38:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 136 states have internal predecessors, (159), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 172 transitions. [2022-02-15 03:38:30,971 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 172 transitions. Word has length 44 [2022-02-15 03:38:30,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:30,972 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 172 transitions. [2022-02-15 03:38:30,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 172 transitions. [2022-02-15 03:38:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 03:38:30,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:30,973 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:30,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 03:38:30,973 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 521215711, now seen corresponding path program 1 times [2022-02-15 03:38:30,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:30,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148995860] [2022-02-15 03:38:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:30,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:30,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:30,989 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:31,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:31,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 03:38:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:31,049 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:31,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148995860] [2022-02-15 03:38:31,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1148995860] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:31,049 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:31,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:38:31,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173813375] [2022-02-15 03:38:31,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:31,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:38:31,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:38:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:38:31,050 INFO L87 Difference]: Start difference. First operand 146 states and 172 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:31,300 INFO L93 Difference]: Finished difference Result 233 states and 280 transitions. [2022-02-15 03:38:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:38:31,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-02-15 03:38:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:31,302 INFO L225 Difference]: With dead ends: 233 [2022-02-15 03:38:31,302 INFO L226 Difference]: Without dead ends: 179 [2022-02-15 03:38:31,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:38:31,303 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:31,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 51 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:31,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-15 03:38:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 149. [2022-02-15 03:38:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 139 states have internal predecessors, (159), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2022-02-15 03:38:31,367 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 44 [2022-02-15 03:38:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:31,367 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2022-02-15 03:38:31,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2022-02-15 03:38:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 03:38:31,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:31,368 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:31,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 03:38:31,368 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1979815022, now seen corresponding path program 3 times [2022-02-15 03:38:31,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:31,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459862429] [2022-02-15 03:38:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:31,369 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:31,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:31,370 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:32,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:32,127 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:32,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459862429] [2022-02-15 03:38:32,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [459862429] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:32,127 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:32,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:38:32,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662106238] [2022-02-15 03:38:32,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:32,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:38:32,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:32,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:38:32,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:38:32,128 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:33,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:33,524 INFO L93 Difference]: Finished difference Result 245 states and 289 transitions. [2022-02-15 03:38:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 03:38:33,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 03:38:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:33,526 INFO L225 Difference]: With dead ends: 245 [2022-02-15 03:38:33,526 INFO L226 Difference]: Without dead ends: 243 [2022-02-15 03:38:33,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=493, Invalid=2929, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 03:38:33,527 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 225 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:33,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 61 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-15 03:38:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 158. [2022-02-15 03:38:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 145 states have (on average 1.1793103448275861) internal successors, (171), 148 states have internal predecessors, (171), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 184 transitions. [2022-02-15 03:38:33,590 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 184 transitions. Word has length 44 [2022-02-15 03:38:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:33,591 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 184 transitions. [2022-02-15 03:38:33,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 184 transitions. [2022-02-15 03:38:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 03:38:33,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:33,591 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:33,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 03:38:33,592 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:33,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1128449496, now seen corresponding path program 4 times [2022-02-15 03:38:33,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:33,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880514796] [2022-02-15 03:38:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:33,593 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:33,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:33,594 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:33,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:33,905 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:33,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880514796] [2022-02-15 03:38:33,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880514796] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:33,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:33,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 03:38:33,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112306932] [2022-02-15 03:38:33,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:33,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 03:38:33,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:33,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 03:38:33,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:38:33,906 INFO L87 Difference]: Start difference. First operand 158 states and 184 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2022-02-15 03:38:34,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:34,967 INFO L93 Difference]: Finished difference Result 214 states and 250 transitions. [2022-02-15 03:38:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 03:38:34,970 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 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 44 [2022-02-15 03:38:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:34,973 INFO L225 Difference]: With dead ends: 214 [2022-02-15 03:38:34,974 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 03:38:34,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=404, Invalid=1852, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 03:38:34,976 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:34,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 93 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 03:38:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 158. [2022-02-15 03:38:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 145 states have (on average 1.1793103448275861) internal successors, (171), 148 states have internal predecessors, (171), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 184 transitions. [2022-02-15 03:38:35,053 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 184 transitions. Word has length 44 [2022-02-15 03:38:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:35,053 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 184 transitions. [2022-02-15 03:38:35,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2022-02-15 03:38:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 184 transitions. [2022-02-15 03:38:35,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 03:38:35,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:35,054 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:35,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 03:38:35,054 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:35,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1585209602, now seen corresponding path program 2 times [2022-02-15 03:38:35,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:35,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238817835] [2022-02-15 03:38:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:35,055 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:35,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:35,056 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 03:38:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:35,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:35,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238817835] [2022-02-15 03:38:35,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [238817835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:35,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:35,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:38:35,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529450992] [2022-02-15 03:38:35,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:35,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:38:35,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:35,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:38:35,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:38:35,578 INFO L87 Difference]: Start difference. First operand 158 states and 184 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:36,913 INFO L93 Difference]: Finished difference Result 245 states and 286 transitions. [2022-02-15 03:38:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 03:38:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-02-15 03:38:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:36,915 INFO L225 Difference]: With dead ends: 245 [2022-02-15 03:38:36,915 INFO L226 Difference]: Without dead ends: 243 [2022-02-15 03:38:36,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=493, Invalid=3047, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 03:38:36,917 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 189 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:36,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 82 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-15 03:38:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 173. [2022-02-15 03:38:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 160 states have (on average 1.18125) internal successors, (189), 163 states have internal predecessors, (189), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 202 transitions. [2022-02-15 03:38:37,001 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 202 transitions. Word has length 47 [2022-02-15 03:38:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:37,001 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 202 transitions. [2022-02-15 03:38:37,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 202 transitions. [2022-02-15 03:38:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 03:38:37,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:37,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:37,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 03:38:37,002 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:37,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:37,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1571697014, now seen corresponding path program 3 times [2022-02-15 03:38:37,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:37,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576722449] [2022-02-15 03:38:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:37,004 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:37,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:37,005 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 03:38:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 03:38:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:37,213 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:37,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576722449] [2022-02-15 03:38:37,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [576722449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:37,213 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:37,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:38:37,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103603649] [2022-02-15 03:38:37,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:37,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:38:37,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:37,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:38:37,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:38:37,214 INFO L87 Difference]: Start difference. First operand 173 states and 202 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:37,709 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2022-02-15 03:38:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:38:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-02-15 03:38:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:37,713 INFO L225 Difference]: With dead ends: 217 [2022-02-15 03:38:37,713 INFO L226 Difference]: Without dead ends: 172 [2022-02-15 03:38:37,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:38:37,714 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:37,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 77 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-15 03:38:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 150. [2022-02-15 03:38:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.144927536231884) internal successors, (158), 141 states have internal predecessors, (158), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 03:38:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2022-02-15 03:38:37,782 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 49 [2022-02-15 03:38:37,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:37,782 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2022-02-15 03:38:37,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:38:37,782 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2022-02-15 03:38:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 03:38:37,782 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:37,782 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:37,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 03:38:37,783 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1212783309, now seen corresponding path program 5 times [2022-02-15 03:38:37,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:37,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449483906] [2022-02-15 03:38:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:37,784 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:37,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:37,785 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:38,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:38,043 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:38,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449483906] [2022-02-15 03:38:38,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [449483906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:38,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:38,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:38:38,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565345018] [2022-02-15 03:38:38,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:38,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:38:38,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:38:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:38:38,044 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:39,186 INFO L93 Difference]: Finished difference Result 235 states and 277 transitions. [2022-02-15 03:38:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 03:38:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 03:38:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:39,188 INFO L225 Difference]: With dead ends: 235 [2022-02-15 03:38:39,188 INFO L226 Difference]: Without dead ends: 233 [2022-02-15 03:38:39,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=875, Invalid=2907, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 03:38:39,189 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 181 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:39,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 70 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-02-15 03:38:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2022-02-15 03:38:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 155 states have internal predecessors, (177), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 03:38:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2022-02-15 03:38:39,264 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 47 [2022-02-15 03:38:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:39,264 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2022-02-15 03:38:39,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2022-02-15 03:38:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 03:38:39,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:39,265 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:39,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 03:38:39,265 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:39,266 INFO L85 PathProgramCache]: Analyzing trace with hash -511718731, now seen corresponding path program 4 times [2022-02-15 03:38:39,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:39,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692046897] [2022-02-15 03:38:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:39,267 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:39,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:39,268 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:39,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:39,328 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:39,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692046897] [2022-02-15 03:38:39,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [692046897] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:39,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:39,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:38:39,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210701531] [2022-02-15 03:38:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:39,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:38:39,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:38:39,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:38:39,329 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:39,723 INFO L93 Difference]: Finished difference Result 234 states and 280 transitions. [2022-02-15 03:38:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 03:38:39,723 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 03:38:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:39,724 INFO L225 Difference]: With dead ends: 234 [2022-02-15 03:38:39,724 INFO L226 Difference]: Without dead ends: 211 [2022-02-15 03:38:39,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:38:39,725 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:39,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 58 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-15 03:38:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 170. [2022-02-15 03:38:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 161 states have internal predecessors, (185), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 03:38:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 197 transitions. [2022-02-15 03:38:39,800 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 197 transitions. Word has length 47 [2022-02-15 03:38:39,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:39,800 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 197 transitions. [2022-02-15 03:38:39,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 197 transitions. [2022-02-15 03:38:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 03:38:39,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:39,801 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:39,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 03:38:39,801 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:39,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1895537965, now seen corresponding path program 6 times [2022-02-15 03:38:39,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:39,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058046789] [2022-02-15 03:38:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:39,803 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:39,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:39,804 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:40,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:40,438 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:40,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058046789] [2022-02-15 03:38:40,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058046789] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:40,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:40,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:38:40,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535124164] [2022-02-15 03:38:40,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:40,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:38:40,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:38:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:38:40,439 INFO L87 Difference]: Start difference. First operand 170 states and 197 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:41,811 INFO L93 Difference]: Finished difference Result 262 states and 307 transitions. [2022-02-15 03:38:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 03:38:41,811 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 03:38:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:41,812 INFO L225 Difference]: With dead ends: 262 [2022-02-15 03:38:41,812 INFO L226 Difference]: Without dead ends: 223 [2022-02-15 03:38:41,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=487, Invalid=2935, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 03:38:41,814 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 186 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:41,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 55 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-15 03:38:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2022-02-15 03:38:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.1746987951807228) internal successors, (195), 169 states have internal predecessors, (195), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 03:38:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2022-02-15 03:38:41,896 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 47 [2022-02-15 03:38:41,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:41,896 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2022-02-15 03:38:41,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2022-02-15 03:38:41,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 03:38:41,897 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:41,897 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:41,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 03:38:41,897 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash -879512715, now seen corresponding path program 5 times [2022-02-15 03:38:41,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:41,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044954477] [2022-02-15 03:38:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:41,898 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:41,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:41,899 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:42,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:42,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:42,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044954477] [2022-02-15 03:38:42,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044954477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:42,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:42,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:38:42,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554947139] [2022-02-15 03:38:42,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:42,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:38:42,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:42,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:38:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:38:42,331 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:43,376 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2022-02-15 03:38:43,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 03:38:43,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 03:38:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:43,378 INFO L225 Difference]: With dead ends: 210 [2022-02-15 03:38:43,378 INFO L226 Difference]: Without dead ends: 208 [2022-02-15 03:38:43,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1860, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 03:38:43,379 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:43,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 107 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-15 03:38:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 163. [2022-02-15 03:38:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 152 states have (on average 1.1710526315789473) internal successors, (178), 154 states have internal predecessors, (178), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 03:38:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 188 transitions. [2022-02-15 03:38:43,489 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 188 transitions. Word has length 47 [2022-02-15 03:38:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:43,490 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 188 transitions. [2022-02-15 03:38:43,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 188 transitions. [2022-02-15 03:38:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 03:38:43,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:43,491 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:43,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 03:38:43,491 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:43,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2050746395, now seen corresponding path program 6 times [2022-02-15 03:38:43,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:43,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548083159] [2022-02-15 03:38:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:43,493 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:43,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:43,494 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:44,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:44,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:44,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548083159] [2022-02-15 03:38:44,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548083159] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:44,036 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:44,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:38:44,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879003879] [2022-02-15 03:38:44,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:44,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:38:44,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:44,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:38:44,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:38:44,037 INFO L87 Difference]: Start difference. First operand 163 states and 188 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:44,857 INFO L93 Difference]: Finished difference Result 219 states and 253 transitions. [2022-02-15 03:38:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 03:38:44,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 03:38:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:44,859 INFO L225 Difference]: With dead ends: 219 [2022-02-15 03:38:44,859 INFO L226 Difference]: Without dead ends: 217 [2022-02-15 03:38:44,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 03:38:44,861 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 112 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:44,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 80 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-02-15 03:38:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 163. [2022-02-15 03:38:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 152 states have (on average 1.1710526315789473) internal successors, (178), 154 states have internal predecessors, (178), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 03:38:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 188 transitions. [2022-02-15 03:38:44,991 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 188 transitions. Word has length 47 [2022-02-15 03:38:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:44,991 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 188 transitions. [2022-02-15 03:38:44,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 188 transitions. [2022-02-15 03:38:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 03:38:44,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:44,993 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:44,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 03:38:44,994 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash 183964909, now seen corresponding path program 4 times [2022-02-15 03:38:44,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:44,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544660988] [2022-02-15 03:38:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:44,996 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:44,998 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:45,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:45,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 03:38:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:45,299 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:45,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544660988] [2022-02-15 03:38:45,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1544660988] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:45,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:45,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:38:45,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630190462] [2022-02-15 03:38:45,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:45,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:38:45,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:45,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:38:45,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:38:45,301 INFO L87 Difference]: Start difference. First operand 163 states and 188 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:45,992 INFO L93 Difference]: Finished difference Result 190 states and 219 transitions. [2022-02-15 03:38:45,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 03:38:45,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 03:38:45,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:45,993 INFO L225 Difference]: With dead ends: 190 [2022-02-15 03:38:45,994 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 03:38:45,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 03:38:45,994 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 107 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:45,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 83 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 03:38:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 177. [2022-02-15 03:38:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 163 states have (on average 1.165644171779141) internal successors, (190), 166 states have internal predecessors, (190), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 204 transitions. [2022-02-15 03:38:46,121 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 204 transitions. Word has length 49 [2022-02-15 03:38:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:46,121 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 204 transitions. [2022-02-15 03:38:46,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 204 transitions. [2022-02-15 03:38:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 03:38:46,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:46,122 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:46,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 03:38:46,123 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:46,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:46,123 INFO L85 PathProgramCache]: Analyzing trace with hash -42029369, now seen corresponding path program 3 times [2022-02-15 03:38:46,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:46,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382225632] [2022-02-15 03:38:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:46,127 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:46,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:46,128 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:46,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:46,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 03:38:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:46,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:46,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382225632] [2022-02-15 03:38:46,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1382225632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:46,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:46,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:38:46,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220145305] [2022-02-15 03:38:46,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:46,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:38:46,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:46,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:38:46,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:38:46,726 INFO L87 Difference]: Start difference. First operand 177 states and 204 transitions. Second operand has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:48,208 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2022-02-15 03:38:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 03:38:48,209 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-02-15 03:38:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:48,209 INFO L225 Difference]: With dead ends: 193 [2022-02-15 03:38:48,210 INFO L226 Difference]: Without dead ends: 153 [2022-02-15 03:38:48,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=485, Invalid=3055, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 03:38:48,212 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 135 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:48,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 89 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:48,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-15 03:38:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 128. [2022-02-15 03:38:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 119 states have internal predecessors, (140), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 03:38:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2022-02-15 03:38:48,291 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 50 [2022-02-15 03:38:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:48,291 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2022-02-15 03:38:48,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2022-02-15 03:38:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 03:38:48,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:48,292 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:48,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 03:38:48,292 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:48,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1165803103, now seen corresponding path program 7 times [2022-02-15 03:38:48,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:48,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143563139] [2022-02-15 03:38:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:48,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:48,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:48,294 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:48,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:48,443 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:48,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143563139] [2022-02-15 03:38:48,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143563139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:48,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:48,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:38:48,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639181342] [2022-02-15 03:38:48,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:48,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:38:48,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:48,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:38:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:38:48,444 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:49,001 INFO L93 Difference]: Finished difference Result 274 states and 330 transitions. [2022-02-15 03:38:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:38:49,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 03:38:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:49,003 INFO L225 Difference]: With dead ends: 274 [2022-02-15 03:38:49,003 INFO L226 Difference]: Without dead ends: 235 [2022-02-15 03:38:49,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:38:49,004 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 308 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:49,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 81 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:38:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-15 03:38:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 197. [2022-02-15 03:38:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 188 states have internal predecessors, (222), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 03:38:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 233 transitions. [2022-02-15 03:38:49,116 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 233 transitions. Word has length 50 [2022-02-15 03:38:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:49,117 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 233 transitions. [2022-02-15 03:38:49,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 233 transitions. [2022-02-15 03:38:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 03:38:49,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:49,117 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:49,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 03:38:49,118 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:49,118 INFO L85 PathProgramCache]: Analyzing trace with hash 904028532, now seen corresponding path program 7 times [2022-02-15 03:38:49,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:49,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528039794] [2022-02-15 03:38:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:49,119 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:49,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:49,120 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:49,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:49,470 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:49,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528039794] [2022-02-15 03:38:49,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [528039794] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:49,470 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:49,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:38:49,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568466314] [2022-02-15 03:38:49,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:49,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:38:49,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:49,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:38:49,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:38:49,472 INFO L87 Difference]: Start difference. First operand 197 states and 233 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:50,776 INFO L93 Difference]: Finished difference Result 323 states and 384 transitions. [2022-02-15 03:38:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 03:38:50,777 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 03:38:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:50,778 INFO L225 Difference]: With dead ends: 323 [2022-02-15 03:38:50,778 INFO L226 Difference]: Without dead ends: 274 [2022-02-15 03:38:50,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=829, Invalid=3331, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 03:38:50,781 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 164 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:50,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 86 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-02-15 03:38:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 189. [2022-02-15 03:38:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 178 states have (on average 1.1741573033707866) internal successors, (209), 180 states have internal predecessors, (209), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 03:38:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 220 transitions. [2022-02-15 03:38:50,905 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 220 transitions. Word has length 50 [2022-02-15 03:38:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:50,906 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 220 transitions. [2022-02-15 03:38:50,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 220 transitions. [2022-02-15 03:38:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 03:38:50,906 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:50,906 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:50,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 03:38:50,907 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1297158544, now seen corresponding path program 8 times [2022-02-15 03:38:50,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:50,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075942565] [2022-02-15 03:38:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:50,908 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:50,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:50,909 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:51,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:51,370 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:51,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075942565] [2022-02-15 03:38:51,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075942565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:51,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:51,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:38:51,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701720177] [2022-02-15 03:38:51,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:51,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:38:51,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:38:51,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:38:51,371 INFO L87 Difference]: Start difference. First operand 189 states and 220 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2022-02-15 03:38:52,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:52,394 INFO L93 Difference]: Finished difference Result 242 states and 281 transitions. [2022-02-15 03:38:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 03:38:52,395 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 [2022-02-15 03:38:52,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:52,396 INFO L225 Difference]: With dead ends: 242 [2022-02-15 03:38:52,396 INFO L226 Difference]: Without dead ends: 240 [2022-02-15 03:38:52,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 03:38:52,397 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 121 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:52,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 92 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-15 03:38:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 189. [2022-02-15 03:38:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 178 states have (on average 1.1797752808988764) internal successors, (210), 180 states have internal predecessors, (210), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 03:38:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 221 transitions. [2022-02-15 03:38:52,511 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 221 transitions. Word has length 50 [2022-02-15 03:38:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:52,512 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 221 transitions. [2022-02-15 03:38:52,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2022-02-15 03:38:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 221 transitions. [2022-02-15 03:38:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 03:38:52,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:52,512 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:52,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 03:38:52,513 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash -787548180, now seen corresponding path program 2 times [2022-02-15 03:38:52,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:52,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104400507] [2022-02-15 03:38:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:52,514 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:52,515 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:52,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:52,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-15 03:38:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:52,951 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:52,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104400507] [2022-02-15 03:38:52,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [104400507] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:52,952 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:52,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:38:52,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312983129] [2022-02-15 03:38:52,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:52,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:38:52,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:52,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:38:52,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:38:52,953 INFO L87 Difference]: Start difference. First operand 189 states and 221 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:55,144 INFO L93 Difference]: Finished difference Result 302 states and 358 transitions. [2022-02-15 03:38:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 03:38:55,145 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 03:38:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:55,147 INFO L225 Difference]: With dead ends: 302 [2022-02-15 03:38:55,147 INFO L226 Difference]: Without dead ends: 300 [2022-02-15 03:38:55,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=556, Invalid=3866, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 03:38:55,151 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 245 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:55,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 89 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:38:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-15 03:38:55,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 216. [2022-02-15 03:38:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 204 states have (on average 1.196078431372549) internal successors, (244), 207 states have internal predecessors, (244), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2022-02-15 03:38:55,289 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 52 [2022-02-15 03:38:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:55,289 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2022-02-15 03:38:55,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2022-02-15 03:38:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 03:38:55,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:55,290 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:55,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 03:38:55,290 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:55,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1609585614, now seen corresponding path program 3 times [2022-02-15 03:38:55,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:55,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929751990] [2022-02-15 03:38:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:55,291 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:55,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:55,292 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:55,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:55,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-15 03:38:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:55,620 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:55,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929751990] [2022-02-15 03:38:55,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [929751990] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:55,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:55,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:38:55,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462662984] [2022-02-15 03:38:55,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:55,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:38:55,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:55,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:38:55,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:38:55,622 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:56,705 INFO L93 Difference]: Finished difference Result 253 states and 298 transitions. [2022-02-15 03:38:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 03:38:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 03:38:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:56,707 INFO L225 Difference]: With dead ends: 253 [2022-02-15 03:38:56,707 INFO L226 Difference]: Without dead ends: 251 [2022-02-15 03:38:56,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 03:38:56,708 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:56,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 84 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-15 03:38:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 216. [2022-02-15 03:38:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 204 states have (on average 1.196078431372549) internal successors, (244), 207 states have internal predecessors, (244), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2022-02-15 03:38:56,907 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 52 [2022-02-15 03:38:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:56,908 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2022-02-15 03:38:56,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:38:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2022-02-15 03:38:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 03:38:56,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:56,909 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:56,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 03:38:56,909 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:56,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1574158879, now seen corresponding path program 8 times [2022-02-15 03:38:56,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:56,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137447662] [2022-02-15 03:38:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:56,911 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:56,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:56,912 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:57,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:57,563 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:57,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137447662] [2022-02-15 03:38:57,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2137447662] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:57,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:57,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:38:57,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951298057] [2022-02-15 03:38:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:57,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:38:57,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:38:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:38:57,564 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:58,921 INFO L93 Difference]: Finished difference Result 366 states and 440 transitions. [2022-02-15 03:38:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 03:38:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 03:38:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:58,922 INFO L225 Difference]: With dead ends: 366 [2022-02-15 03:38:58,923 INFO L226 Difference]: Without dead ends: 364 [2022-02-15 03:38:58,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=388, Invalid=2692, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 03:38:58,924 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 307 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:58,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 58 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-15 03:38:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 265. [2022-02-15 03:38:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 251 states have (on average 1.1952191235059761) internal successors, (300), 255 states have internal predecessors, (300), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 03:38:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 315 transitions. [2022-02-15 03:38:59,162 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 315 transitions. Word has length 52 [2022-02-15 03:38:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:59,163 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 315 transitions. [2022-02-15 03:38:59,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 315 transitions. [2022-02-15 03:38:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 03:38:59,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:59,164 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:59,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 03:38:59,164 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1534105639, now seen corresponding path program 9 times [2022-02-15 03:38:59,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:59,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041278003] [2022-02-15 03:38:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:59,166 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:59,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:59,168 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:59,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:59,837 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:59,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041278003] [2022-02-15 03:38:59,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041278003] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:59,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:59,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 03:38:59,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228624774] [2022-02-15 03:38:59,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:59,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 03:38:59,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:59,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 03:38:59,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:38:59,838 INFO L87 Difference]: Start difference. First operand 265 states and 315 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:01,098 INFO L93 Difference]: Finished difference Result 377 states and 451 transitions. [2022-02-15 03:39:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 03:39:01,098 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 03:39:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:01,099 INFO L225 Difference]: With dead ends: 377 [2022-02-15 03:39:01,100 INFO L226 Difference]: Without dead ends: 375 [2022-02-15 03:39:01,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=458, Invalid=2622, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 03:39:01,100 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 277 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:01,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 58 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-02-15 03:39:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 268. [2022-02-15 03:39:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 254 states have (on average 1.1968503937007875) internal successors, (304), 258 states have internal predecessors, (304), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 03:39:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 319 transitions. [2022-02-15 03:39:01,295 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 319 transitions. Word has length 52 [2022-02-15 03:39:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:01,295 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 319 transitions. [2022-02-15 03:39:01,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 319 transitions. [2022-02-15 03:39:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 03:39:01,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:01,296 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:01,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 03:39:01,296 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:01,297 INFO L85 PathProgramCache]: Analyzing trace with hash 650625165, now seen corresponding path program 4 times [2022-02-15 03:39:01,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:01,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812096484] [2022-02-15 03:39:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:01,298 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:01,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:01,299 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:01,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:01,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 03:39:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:01,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:01,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812096484] [2022-02-15 03:39:01,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [812096484] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:01,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:01,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:39:01,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754060540] [2022-02-15 03:39:01,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:01,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:39:01,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:01,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:39:01,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:39:01,477 INFO L87 Difference]: Start difference. First operand 268 states and 319 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:39:03,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:03,046 INFO L93 Difference]: Finished difference Result 369 states and 438 transitions. [2022-02-15 03:39:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 03:39:03,047 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 03:39:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:03,048 INFO L225 Difference]: With dead ends: 369 [2022-02-15 03:39:03,048 INFO L226 Difference]: Without dead ends: 367 [2022-02-15 03:39:03,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 03:39:03,051 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 146 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:03,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 118 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:39:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-15 03:39:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 271. [2022-02-15 03:39:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 257 states have (on average 1.198443579766537) internal successors, (308), 261 states have internal predecessors, (308), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 03:39:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 323 transitions. [2022-02-15 03:39:03,348 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 323 transitions. Word has length 55 [2022-02-15 03:39:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:03,348 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 323 transitions. [2022-02-15 03:39:03,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:39:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 323 transitions. [2022-02-15 03:39:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 03:39:03,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:03,349 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:03,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 03:39:03,349 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:03,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1236950663, now seen corresponding path program 5 times [2022-02-15 03:39:03,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:03,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806341617] [2022-02-15 03:39:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:03,351 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:03,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:03,352 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:03,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:03,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 03:39:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:03,591 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:03,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806341617] [2022-02-15 03:39:03,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806341617] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:03,592 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:03,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:39:03,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451196704] [2022-02-15 03:39:03,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:03,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:39:03,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:39:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:39:03,593 INFO L87 Difference]: Start difference. First operand 271 states and 323 transitions. Second operand has 17 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:39:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:04,687 INFO L93 Difference]: Finished difference Result 361 states and 428 transitions. [2022-02-15 03:39:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 03:39:04,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 03:39:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:04,689 INFO L225 Difference]: With dead ends: 361 [2022-02-15 03:39:04,689 INFO L226 Difference]: Without dead ends: 359 [2022-02-15 03:39:04,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 03:39:04,690 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 165 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:04,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 96 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-15 03:39:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 291. [2022-02-15 03:39:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 272 states have (on average 1.1875) internal successors, (323), 279 states have internal predecessors, (323), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-15 03:39:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 346 transitions. [2022-02-15 03:39:04,910 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 346 transitions. Word has length 55 [2022-02-15 03:39:04,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:04,910 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 346 transitions. [2022-02-15 03:39:04,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:39:04,910 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 346 transitions. [2022-02-15 03:39:04,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 03:39:04,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:04,911 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:04,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 03:39:04,912 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:04,912 INFO L85 PathProgramCache]: Analyzing trace with hash 555461839, now seen corresponding path program 4 times [2022-02-15 03:39:04,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:04,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138618193] [2022-02-15 03:39:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:04,913 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:04,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:04,915 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:05,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:05,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 03:39:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:05,608 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:05,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138618193] [2022-02-15 03:39:05,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [138618193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:05,608 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:05,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:39:05,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191054592] [2022-02-15 03:39:05,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:05,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:39:05,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:05,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:39:05,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:39:05,609 INFO L87 Difference]: Start difference. First operand 291 states and 346 transitions. Second operand has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:39:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:07,537 INFO L93 Difference]: Finished difference Result 360 states and 425 transitions. [2022-02-15 03:39:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 03:39:07,537 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 03:39:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:07,539 INFO L225 Difference]: With dead ends: 360 [2022-02-15 03:39:07,539 INFO L226 Difference]: Without dead ends: 358 [2022-02-15 03:39:07,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=602, Invalid=4510, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 03:39:07,540 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 153 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:07,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 106 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:39:07,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-15 03:39:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 318. [2022-02-15 03:39:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 299 states have (on average 1.1872909698996656) internal successors, (355), 306 states have internal predecessors, (355), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-15 03:39:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 378 transitions. [2022-02-15 03:39:07,865 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 378 transitions. Word has length 55 [2022-02-15 03:39:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:07,865 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 378 transitions. [2022-02-15 03:39:07,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:39:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 378 transitions. [2022-02-15 03:39:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 03:39:07,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:07,866 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:07,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 03:39:07,867 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1147005369, now seen corresponding path program 5 times [2022-02-15 03:39:07,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:07,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450936406] [2022-02-15 03:39:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:07,869 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:07,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:07,870 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:08,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:08,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 03:39:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:08,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 03:39:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:08,216 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:08,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450936406] [2022-02-15 03:39:08,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [450936406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:08,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:08,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:39:08,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565923926] [2022-02-15 03:39:08,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:08,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:39:08,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:08,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:39:08,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:08,217 INFO L87 Difference]: Start difference. First operand 318 states and 378 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:39:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:09,154 INFO L93 Difference]: Finished difference Result 384 states and 456 transitions. [2022-02-15 03:39:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 03:39:09,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-02-15 03:39:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:09,156 INFO L225 Difference]: With dead ends: 384 [2022-02-15 03:39:09,157 INFO L226 Difference]: Without dead ends: 382 [2022-02-15 03:39:09,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 03:39:09,157 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 146 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:09,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 72 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-02-15 03:39:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 368. [2022-02-15 03:39:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 340 states have (on average 1.1705882352941177) internal successors, (398), 351 states have internal predecessors, (398), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 03:39:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 437 transitions. [2022-02-15 03:39:09,502 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 437 transitions. Word has length 57 [2022-02-15 03:39:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:09,502 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 437 transitions. [2022-02-15 03:39:09,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:39:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 437 transitions. [2022-02-15 03:39:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 03:39:09,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:09,504 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:09,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 03:39:09,504 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1946369156, now seen corresponding path program 10 times [2022-02-15 03:39:09,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:09,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244018264] [2022-02-15 03:39:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:09,508 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:09,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:09,510 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:10,329 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:10,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244018264] [2022-02-15 03:39:10,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1244018264] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:10,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:10,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 03:39:10,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664256292] [2022-02-15 03:39:10,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:10,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 03:39:10,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 03:39:10,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:39:10,332 INFO L87 Difference]: Start difference. First operand 368 states and 437 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:12,252 INFO L93 Difference]: Finished difference Result 513 states and 616 transitions. [2022-02-15 03:39:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 03:39:12,252 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 03:39:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:12,254 INFO L225 Difference]: With dead ends: 513 [2022-02-15 03:39:12,254 INFO L226 Difference]: Without dead ends: 511 [2022-02-15 03:39:12,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=516, Invalid=3774, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 03:39:12,255 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 299 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:12,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 85 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:39:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-15 03:39:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 412. [2022-02-15 03:39:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 378 states have (on average 1.1719576719576719) internal successors, (443), 393 states have internal predecessors, (443), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (23), 8 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 03:39:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 490 transitions. [2022-02-15 03:39:12,618 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 490 transitions. Word has length 55 [2022-02-15 03:39:12,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:12,619 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 490 transitions. [2022-02-15 03:39:12,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 490 transitions. [2022-02-15 03:39:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 03:39:12,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:12,621 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:12,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 03:39:12,622 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:12,622 INFO L85 PathProgramCache]: Analyzing trace with hash -426979644, now seen corresponding path program 11 times [2022-02-15 03:39:12,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:12,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907026199] [2022-02-15 03:39:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:12,623 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:12,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:12,627 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:12,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:12,991 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:12,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907026199] [2022-02-15 03:39:12,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [907026199] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:12,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:12,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:39:12,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546434476] [2022-02-15 03:39:12,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:12,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:39:12,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:12,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:39:12,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:39:12,992 INFO L87 Difference]: Start difference. First operand 412 states and 490 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:14,469 INFO L93 Difference]: Finished difference Result 466 states and 554 transitions. [2022-02-15 03:39:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 03:39:14,471 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 03:39:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:14,473 INFO L225 Difference]: With dead ends: 466 [2022-02-15 03:39:14,473 INFO L226 Difference]: Without dead ends: 464 [2022-02-15 03:39:14,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=2632, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 03:39:14,474 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 200 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:14,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 75 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-02-15 03:39:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 426. [2022-02-15 03:39:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 390 states have (on average 1.1717948717948719) internal successors, (457), 406 states have internal predecessors, (457), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (24), 8 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-15 03:39:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 506 transitions. [2022-02-15 03:39:14,871 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 506 transitions. Word has length 55 [2022-02-15 03:39:14,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:14,871 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 506 transitions. [2022-02-15 03:39:14,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 506 transitions. [2022-02-15 03:39:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 03:39:14,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:14,880 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:14,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 03:39:14,880 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1046366456, now seen corresponding path program 12 times [2022-02-15 03:39:14,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:14,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761507973] [2022-02-15 03:39:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:14,882 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:14,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:14,883 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:15,524 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:15,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761507973] [2022-02-15 03:39:15,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1761507973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:15,524 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:15,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:39:15,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360263423] [2022-02-15 03:39:15,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:15,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:39:15,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:15,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:39:15,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:15,525 INFO L87 Difference]: Start difference. First operand 426 states and 506 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:17,228 INFO L93 Difference]: Finished difference Result 525 states and 626 transitions. [2022-02-15 03:39:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 03:39:17,228 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 03:39:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:17,231 INFO L225 Difference]: With dead ends: 525 [2022-02-15 03:39:17,231 INFO L226 Difference]: Without dead ends: 523 [2022-02-15 03:39:17,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=2666, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 03:39:17,240 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 220 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:17,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 85 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:39:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-15 03:39:17,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 445. [2022-02-15 03:39:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 407 states have (on average 1.1744471744471745) internal successors, (478), 424 states have internal predecessors, (478), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (25), 8 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-15 03:39:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 529 transitions. [2022-02-15 03:39:17,746 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 529 transitions. Word has length 55 [2022-02-15 03:39:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:17,747 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 529 transitions. [2022-02-15 03:39:17,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 529 transitions. [2022-02-15 03:39:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 03:39:17,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:17,755 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:17,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 03:39:17,755 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash -140336322, now seen corresponding path program 13 times [2022-02-15 03:39:17,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:17,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174959252] [2022-02-15 03:39:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:17,757 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:17,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:17,759 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:18,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:18,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:18,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174959252] [2022-02-15 03:39:18,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174959252] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:18,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:18,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:39:18,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707931949] [2022-02-15 03:39:18,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:18,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:39:18,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:18,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:39:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:39:18,399 INFO L87 Difference]: Start difference. First operand 445 states and 529 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:20,410 INFO L93 Difference]: Finished difference Result 560 states and 669 transitions. [2022-02-15 03:39:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 03:39:20,410 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 03:39:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:20,412 INFO L225 Difference]: With dead ends: 560 [2022-02-15 03:39:20,412 INFO L226 Difference]: Without dead ends: 558 [2022-02-15 03:39:20,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=516, Invalid=3644, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 03:39:20,414 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 226 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:20,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 103 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:39:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-02-15 03:39:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 467. [2022-02-15 03:39:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 426 states have (on average 1.1737089201877935) internal successors, (500), 445 states have internal predecessors, (500), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (27), 8 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-15 03:39:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 555 transitions. [2022-02-15 03:39:20,852 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 555 transitions. Word has length 55 [2022-02-15 03:39:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:20,852 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 555 transitions. [2022-02-15 03:39:20,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 555 transitions. [2022-02-15 03:39:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 03:39:20,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:20,854 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:20,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 03:39:20,854 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:20,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1524488624, now seen corresponding path program 9 times [2022-02-15 03:39:20,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:20,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723359433] [2022-02-15 03:39:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:20,856 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:20,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:20,857 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:21,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:21,414 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:21,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723359433] [2022-02-15 03:39:21,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1723359433] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:21,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:21,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:39:21,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766221072] [2022-02-15 03:39:21,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:21,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:39:21,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:21,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:39:21,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:39:21,416 INFO L87 Difference]: Start difference. First operand 467 states and 555 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:22,686 INFO L93 Difference]: Finished difference Result 547 states and 652 transitions. [2022-02-15 03:39:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 03:39:22,687 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 03:39:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:22,688 INFO L225 Difference]: With dead ends: 547 [2022-02-15 03:39:22,688 INFO L226 Difference]: Without dead ends: 545 [2022-02-15 03:39:22,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 03:39:22,692 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 124 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:22,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 89 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:22,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-02-15 03:39:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 473. [2022-02-15 03:39:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 433 states have (on average 1.1801385681293302) internal successors, (511), 451 states have internal predecessors, (511), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (26), 8 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-15 03:39:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 564 transitions. [2022-02-15 03:39:23,137 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 564 transitions. Word has length 55 [2022-02-15 03:39:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:23,137 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 564 transitions. [2022-02-15 03:39:23,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 564 transitions. [2022-02-15 03:39:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 03:39:23,139 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:23,139 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:23,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 03:39:23,139 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:23,139 INFO L85 PathProgramCache]: Analyzing trace with hash 337785846, now seen corresponding path program 10 times [2022-02-15 03:39:23,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:23,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465803896] [2022-02-15 03:39:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:23,140 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:23,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:23,142 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:23,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:23,645 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:23,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465803896] [2022-02-15 03:39:23,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465803896] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:23,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:23,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:39:23,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379120692] [2022-02-15 03:39:23,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:23,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:39:23,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:39:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:23,646 INFO L87 Difference]: Start difference. First operand 473 states and 564 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:25,214 INFO L93 Difference]: Finished difference Result 555 states and 662 transitions. [2022-02-15 03:39:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 03:39:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 03:39:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:25,216 INFO L225 Difference]: With dead ends: 555 [2022-02-15 03:39:25,217 INFO L226 Difference]: Without dead ends: 553 [2022-02-15 03:39:25,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 03:39:25,219 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 136 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:25,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 75 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:25,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-02-15 03:39:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 495. [2022-02-15 03:39:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 453 states have (on average 1.1810154525386314) internal successors, (535), 472 states have internal predecessors, (535), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (27), 8 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-15 03:39:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 590 transitions. [2022-02-15 03:39:25,813 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 590 transitions. Word has length 55 [2022-02-15 03:39:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:25,813 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 590 transitions. [2022-02-15 03:39:25,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 590 transitions. [2022-02-15 03:39:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:25,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:25,814 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:25,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 03:39:25,815 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:25,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1285024718, now seen corresponding path program 5 times [2022-02-15 03:39:25,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:25,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374942962] [2022-02-15 03:39:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:25,816 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:25,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:25,819 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:26,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:26,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 03:39:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:26,628 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:26,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374942962] [2022-02-15 03:39:26,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1374942962] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:26,629 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:26,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:39:26,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363004217] [2022-02-15 03:39:26,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:26,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:39:26,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:26,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:39:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:39:26,630 INFO L87 Difference]: Start difference. First operand 495 states and 590 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:39:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:29,304 INFO L93 Difference]: Finished difference Result 613 states and 730 transitions. [2022-02-15 03:39:29,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 03:39:29,304 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 03:39:29,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:29,306 INFO L225 Difference]: With dead ends: 613 [2022-02-15 03:39:29,306 INFO L226 Difference]: Without dead ends: 611 [2022-02-15 03:39:29,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1035, Invalid=6621, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 03:39:29,308 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 275 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:29,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 99 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:39:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-15 03:39:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 522. [2022-02-15 03:39:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 478 states have (on average 1.1778242677824269) internal successors, (563), 497 states have internal predecessors, (563), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (28), 9 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-15 03:39:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 620 transitions. [2022-02-15 03:39:29,745 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 620 transitions. Word has length 58 [2022-02-15 03:39:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:29,746 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 620 transitions. [2022-02-15 03:39:29,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:39:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 620 transitions. [2022-02-15 03:39:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:29,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:29,747 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:29,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 03:39:29,747 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1642798748, now seen corresponding path program 6 times [2022-02-15 03:39:29,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:29,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597106755] [2022-02-15 03:39:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:29,748 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:29,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:29,750 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:30,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:30,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 03:39:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:30,434 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:30,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597106755] [2022-02-15 03:39:30,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1597106755] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:30,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:30,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:39:30,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748387341] [2022-02-15 03:39:30,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:30,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:39:30,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:30,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:39:30,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:39:30,435 INFO L87 Difference]: Start difference. First operand 522 states and 620 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:39:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:32,450 INFO L93 Difference]: Finished difference Result 552 states and 654 transitions. [2022-02-15 03:39:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 03:39:32,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 03:39:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:32,452 INFO L225 Difference]: With dead ends: 552 [2022-02-15 03:39:32,452 INFO L226 Difference]: Without dead ends: 550 [2022-02-15 03:39:32,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=3441, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 03:39:32,453 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 126 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:32,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:39:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-02-15 03:39:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 485. [2022-02-15 03:39:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 443 states have (on average 1.18058690744921) internal successors, (523), 461 states have internal predecessors, (523), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (26), 8 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-15 03:39:32,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 576 transitions. [2022-02-15 03:39:32,946 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 576 transitions. Word has length 58 [2022-02-15 03:39:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:32,946 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 576 transitions. [2022-02-15 03:39:32,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:39:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 576 transitions. [2022-02-15 03:39:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 03:39:32,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:32,947 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:32,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 03:39:32,948 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:32,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1797092794, now seen corresponding path program 6 times [2022-02-15 03:39:32,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:32,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114688811] [2022-02-15 03:39:32,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:32,949 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:32,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:32,950 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:33,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:33,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-15 03:39:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:33,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 03:39:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:33,271 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:33,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114688811] [2022-02-15 03:39:33,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [114688811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:33,271 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:33,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:39:33,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332152180] [2022-02-15 03:39:33,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:33,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:39:33,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:33,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:39:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:33,272 INFO L87 Difference]: Start difference. First operand 485 states and 576 transitions. Second operand has 19 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:39:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:34,542 INFO L93 Difference]: Finished difference Result 519 states and 616 transitions. [2022-02-15 03:39:34,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 03:39:34,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2022-02-15 03:39:34,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:34,545 INFO L225 Difference]: With dead ends: 519 [2022-02-15 03:39:34,545 INFO L226 Difference]: Without dead ends: 517 [2022-02-15 03:39:34,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 03:39:34,547 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 155 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:34,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 90 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-02-15 03:39:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 451. [2022-02-15 03:39:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 416 states have (on average 1.1899038461538463) internal successors, (495), 431 states have internal predecessors, (495), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 03:39:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 538 transitions. [2022-02-15 03:39:34,912 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 538 transitions. Word has length 60 [2022-02-15 03:39:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:34,913 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 538 transitions. [2022-02-15 03:39:34,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:39:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 538 transitions. [2022-02-15 03:39:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:34,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:34,913 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:34,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 03:39:34,914 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:34,914 INFO L85 PathProgramCache]: Analyzing trace with hash -141469330, now seen corresponding path program 14 times [2022-02-15 03:39:34,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:34,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876732335] [2022-02-15 03:39:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:34,915 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:34,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:34,916 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:35,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:35,114 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:35,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876732335] [2022-02-15 03:39:35,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [876732335] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:35,115 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:35,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:39:35,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441542550] [2022-02-15 03:39:35,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:35,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:39:35,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:35,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:39:35,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:35,115 INFO L87 Difference]: Start difference. First operand 451 states and 538 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:36,637 INFO L93 Difference]: Finished difference Result 831 states and 1016 transitions. [2022-02-15 03:39:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 03:39:36,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 03:39:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:36,640 INFO L225 Difference]: With dead ends: 831 [2022-02-15 03:39:36,640 INFO L226 Difference]: Without dead ends: 744 [2022-02-15 03:39:36,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:39:36,641 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 610 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:36,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 96 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-02-15 03:39:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 638. [2022-02-15 03:39:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 603 states have (on average 1.2023217247097844) internal successors, (725), 618 states have internal predecessors, (725), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 03:39:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 768 transitions. [2022-02-15 03:39:37,346 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 768 transitions. Word has length 58 [2022-02-15 03:39:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:37,346 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 768 transitions. [2022-02-15 03:39:37,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 768 transitions. [2022-02-15 03:39:37,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:37,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:37,347 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:37,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 03:39:37,348 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:37,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1104308479, now seen corresponding path program 15 times [2022-02-15 03:39:37,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:37,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197857531] [2022-02-15 03:39:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:37,349 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:37,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:37,351 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:37,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:37,661 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:37,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197857531] [2022-02-15 03:39:37,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197857531] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:37,661 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:37,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 03:39:37,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845139119] [2022-02-15 03:39:37,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:37,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 03:39:37,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 03:39:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:39:37,662 INFO L87 Difference]: Start difference. First operand 638 states and 768 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2022-02-15 03:39:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:40,074 INFO L93 Difference]: Finished difference Result 831 states and 1008 transitions. [2022-02-15 03:39:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 03:39:40,074 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 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 58 [2022-02-15 03:39:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:40,077 INFO L225 Difference]: With dead ends: 831 [2022-02-15 03:39:40,077 INFO L226 Difference]: Without dead ends: 829 [2022-02-15 03:39:40,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1477, Invalid=4685, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 03:39:40,078 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 275 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:40,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 73 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-02-15 03:39:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 657. [2022-02-15 03:39:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 622 states have (on average 1.2090032154340835) internal successors, (752), 637 states have internal predecessors, (752), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 03:39:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 795 transitions. [2022-02-15 03:39:40,633 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 795 transitions. Word has length 58 [2022-02-15 03:39:40,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:40,633 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 795 transitions. [2022-02-15 03:39:40,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2022-02-15 03:39:40,633 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 795 transitions. [2022-02-15 03:39:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:40,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:40,634 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:40,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 03:39:40,634 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash -403243901, now seen corresponding path program 11 times [2022-02-15 03:39:40,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:40,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255722373] [2022-02-15 03:39:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:40,636 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:40,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:40,637 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:40,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:40,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:40,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255722373] [2022-02-15 03:39:40,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [255722373] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:40,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:40,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:40,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556663533] [2022-02-15 03:39:40,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:40,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:40,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:40,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:40,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:40,754 INFO L87 Difference]: Start difference. First operand 657 states and 795 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-02-15 03:39:42,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:42,129 INFO L93 Difference]: Finished difference Result 817 states and 993 transitions. [2022-02-15 03:39:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 03:39:42,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 58 [2022-02-15 03:39:42,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:42,132 INFO L225 Difference]: With dead ends: 817 [2022-02-15 03:39:42,132 INFO L226 Difference]: Without dead ends: 787 [2022-02-15 03:39:42,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:39:42,134 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:42,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 60 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:42,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-02-15 03:39:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 664. [2022-02-15 03:39:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 629 states have (on average 1.208267090620032) internal successors, (760), 644 states have internal predecessors, (760), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 03:39:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 803 transitions. [2022-02-15 03:39:42,953 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 803 transitions. Word has length 58 [2022-02-15 03:39:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:42,954 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 803 transitions. [2022-02-15 03:39:42,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-02-15 03:39:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 803 transitions. [2022-02-15 03:39:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:42,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:42,955 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:42,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 03:39:42,956 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1786782527, now seen corresponding path program 16 times [2022-02-15 03:39:42,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:42,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904707187] [2022-02-15 03:39:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:42,968 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:42,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:42,970 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:44,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:44,231 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:44,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904707187] [2022-02-15 03:39:44,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [904707187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:44,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:44,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:39:44,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606144004] [2022-02-15 03:39:44,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:44,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:39:44,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:44,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:39:44,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:39:44,232 INFO L87 Difference]: Start difference. First operand 664 states and 803 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2022-02-15 03:39:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:46,567 INFO L93 Difference]: Finished difference Result 759 states and 915 transitions. [2022-02-15 03:39:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 03:39:46,567 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 [2022-02-15 03:39:46,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:46,572 INFO L225 Difference]: With dead ends: 759 [2022-02-15 03:39:46,572 INFO L226 Difference]: Without dead ends: 757 [2022-02-15 03:39:46,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=376, Invalid=2486, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 03:39:46,573 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 204 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:46,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 63 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:39:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-02-15 03:39:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 670. [2022-02-15 03:39:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 635 states have (on average 1.2094488188976378) internal successors, (768), 650 states have internal predecessors, (768), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 03:39:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 811 transitions. [2022-02-15 03:39:47,381 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 811 transitions. Word has length 58 [2022-02-15 03:39:47,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:47,381 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 811 transitions. [2022-02-15 03:39:47,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2022-02-15 03:39:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 811 transitions. [2022-02-15 03:39:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:47,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:47,384 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:47,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 03:39:47,384 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:47,385 INFO L85 PathProgramCache]: Analyzing trace with hash -266865911, now seen corresponding path program 12 times [2022-02-15 03:39:47,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:47,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519394708] [2022-02-15 03:39:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:47,386 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:47,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:47,388 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:47,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:47,885 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:47,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519394708] [2022-02-15 03:39:47,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519394708] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:47,885 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:47,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:39:47,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012738203] [2022-02-15 03:39:47,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:47,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:39:47,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:47,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:39:47,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:47,887 INFO L87 Difference]: Start difference. First operand 670 states and 811 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2022-02-15 03:39:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:51,092 INFO L93 Difference]: Finished difference Result 820 states and 990 transitions. [2022-02-15 03:39:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 03:39:51,093 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 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 [2022-02-15 03:39:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:51,096 INFO L225 Difference]: With dead ends: 820 [2022-02-15 03:39:51,096 INFO L226 Difference]: Without dead ends: 818 [2022-02-15 03:39:51,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=662, Invalid=4888, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 03:39:51,097 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 347 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2362 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 2362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:51,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 127 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 2362 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:39:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-02-15 03:39:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 657. [2022-02-15 03:39:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 619 states have (on average 1.2051696284329563) internal successors, (746), 636 states have internal predecessors, (746), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 6 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 03:39:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 793 transitions. [2022-02-15 03:39:51,684 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 793 transitions. Word has length 58 [2022-02-15 03:39:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:51,684 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 793 transitions. [2022-02-15 03:39:51,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2022-02-15 03:39:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 793 transitions. [2022-02-15 03:39:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:51,685 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:51,686 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:51,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 03:39:51,686 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:51,686 INFO L85 PathProgramCache]: Analyzing trace with hash 396084749, now seen corresponding path program 17 times [2022-02-15 03:39:51,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:51,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513275110] [2022-02-15 03:39:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:51,687 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:51,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:51,688 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:52,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:52,336 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:52,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513275110] [2022-02-15 03:39:52,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [513275110] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:52,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:52,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:39:52,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503305878] [2022-02-15 03:39:52,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:52,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:39:52,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:52,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:39:52,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:39:52,338 INFO L87 Difference]: Start difference. First operand 657 states and 793 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) [2022-02-15 03:39:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:54,546 INFO L93 Difference]: Finished difference Result 801 states and 966 transitions. [2022-02-15 03:39:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 03:39:54,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 58 [2022-02-15 03:39:54,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:54,549 INFO L225 Difference]: With dead ends: 801 [2022-02-15 03:39:54,550 INFO L226 Difference]: Without dead ends: 799 [2022-02-15 03:39:54,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=482, Invalid=3300, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 03:39:54,551 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:54,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 118 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:39:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-02-15 03:39:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 653. [2022-02-15 03:39:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 618 states have (on average 1.2103559870550162) internal successors, (748), 633 states have internal predecessors, (748), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 03:39:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 791 transitions. [2022-02-15 03:39:55,176 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 791 transitions. Word has length 58 [2022-02-15 03:39:55,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:55,176 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 791 transitions. [2022-02-15 03:39:55,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) [2022-02-15 03:39:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 791 transitions. [2022-02-15 03:39:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:55,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:55,177 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:55,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 03:39:55,178 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash -441878337, now seen corresponding path program 13 times [2022-02-15 03:39:55,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:55,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339234165] [2022-02-15 03:39:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:55,179 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:55,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:55,180 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:55,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:55,787 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:55,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339234165] [2022-02-15 03:39:55,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1339234165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:55,787 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:55,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 03:39:55,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144989173] [2022-02-15 03:39:55,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:55,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 03:39:55,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:55,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 03:39:55,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:39:55,788 INFO L87 Difference]: Start difference. First operand 653 states and 791 transitions. Second operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 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) [2022-02-15 03:39:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:57,817 INFO L93 Difference]: Finished difference Result 755 states and 913 transitions. [2022-02-15 03:39:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 03:39:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 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 58 [2022-02-15 03:39:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:57,821 INFO L225 Difference]: With dead ends: 755 [2022-02-15 03:39:57,821 INFO L226 Difference]: Without dead ends: 753 [2022-02-15 03:39:57,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=479, Invalid=2713, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 03:39:57,824 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 173 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:57,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 78 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-02-15 03:39:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 674. [2022-02-15 03:39:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 639 states have (on average 1.214397496087637) internal successors, (776), 654 states have internal predecessors, (776), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 03:39:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 819 transitions. [2022-02-15 03:39:58,685 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 819 transitions. Word has length 58 [2022-02-15 03:39:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:58,685 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 819 transitions. [2022-02-15 03:39:58,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 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) [2022-02-15 03:39:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 819 transitions. [2022-02-15 03:39:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:58,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:58,687 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:58,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 03:39:58,687 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:58,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2022038101, now seen corresponding path program 14 times [2022-02-15 03:39:58,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:58,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514580526] [2022-02-15 03:39:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:58,689 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:58,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:58,704 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:59,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:59,315 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:59,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514580526] [2022-02-15 03:39:59,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514580526] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:59,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:59,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:39:59,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076363691] [2022-02-15 03:39:59,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:59,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:39:59,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:59,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:39:59,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:59,316 INFO L87 Difference]: Start difference. First operand 674 states and 819 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2022-02-15 03:40:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:01,491 INFO L93 Difference]: Finished difference Result 822 states and 994 transitions. [2022-02-15 03:40:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 03:40:01,492 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 58 [2022-02-15 03:40:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:01,495 INFO L225 Difference]: With dead ends: 822 [2022-02-15 03:40:01,495 INFO L226 Difference]: Without dead ends: 820 [2022-02-15 03:40:01,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=2997, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 03:40:01,496 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 184 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:01,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 75 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:40:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-02-15 03:40:02,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 640. [2022-02-15 03:40:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 610 states have (on average 1.219672131147541) internal successors, (744), 621 states have internal predecessors, (744), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 6 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 03:40:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 779 transitions. [2022-02-15 03:40:02,250 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 779 transitions. Word has length 58 [2022-02-15 03:40:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:02,250 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 779 transitions. [2022-02-15 03:40:02,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2022-02-15 03:40:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 779 transitions. [2022-02-15 03:40:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 03:40:02,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:02,252 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:02,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 03:40:02,252 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:02,252 INFO L85 PathProgramCache]: Analyzing trace with hash 117942087, now seen corresponding path program 7 times [2022-02-15 03:40:02,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:02,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545160573] [2022-02-15 03:40:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:02,254 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:02,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:02,255 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:02,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:02,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 03:40:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:02,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:02,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545160573] [2022-02-15 03:40:02,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545160573] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:02,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:02,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 03:40:02,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372853060] [2022-02-15 03:40:02,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:02,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 03:40:02,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 03:40:02,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:40:02,726 INFO L87 Difference]: Start difference. First operand 640 states and 779 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:05,048 INFO L93 Difference]: Finished difference Result 716 states and 868 transitions. [2022-02-15 03:40:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 03:40:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-02-15 03:40:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:05,051 INFO L225 Difference]: With dead ends: 716 [2022-02-15 03:40:05,051 INFO L226 Difference]: Without dead ends: 714 [2022-02-15 03:40:05,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=416, Invalid=3366, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 03:40:05,052 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 185 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:05,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 127 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:40:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-02-15 03:40:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 580. [2022-02-15 03:40:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 556 states have (on average 1.224820143884892) internal successors, (681), 564 states have internal predecessors, (681), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-15 03:40:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 708 transitions. [2022-02-15 03:40:05,766 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 708 transitions. Word has length 60 [2022-02-15 03:40:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:05,766 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 708 transitions. [2022-02-15 03:40:05,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 708 transitions. [2022-02-15 03:40:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 03:40:05,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:05,768 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:05,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 03:40:05,768 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash 470069801, now seen corresponding path program 7 times [2022-02-15 03:40:05,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:05,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539724354] [2022-02-15 03:40:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:05,779 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:05,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:05,782 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:06,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:06,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 03:40:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:06,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:06,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539724354] [2022-02-15 03:40:06,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1539724354] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:06,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:06,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 03:40:06,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007390970] [2022-02-15 03:40:06,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:06,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 03:40:06,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:06,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 03:40:06,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:40:06,693 INFO L87 Difference]: Start difference. First operand 580 states and 708 transitions. Second operand has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:09,160 INFO L93 Difference]: Finished difference Result 739 states and 895 transitions. [2022-02-15 03:40:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 03:40:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 03:40:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:09,163 INFO L225 Difference]: With dead ends: 739 [2022-02-15 03:40:09,163 INFO L226 Difference]: Without dead ends: 737 [2022-02-15 03:40:09,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=638, Invalid=5214, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 03:40:09,164 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 236 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:09,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 98 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:40:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-02-15 03:40:09,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 619. [2022-02-15 03:40:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 594 states have (on average 1.2222222222222223) internal successors, (726), 603 states have internal predecessors, (726), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 5 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-15 03:40:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 755 transitions. [2022-02-15 03:40:09,912 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 755 transitions. Word has length 61 [2022-02-15 03:40:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:09,912 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 755 transitions. [2022-02-15 03:40:09,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 755 transitions. [2022-02-15 03:40:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 03:40:09,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:09,914 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:09,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 03:40:09,914 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1495534305, now seen corresponding path program 8 times [2022-02-15 03:40:09,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:09,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833114631] [2022-02-15 03:40:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:09,916 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:09,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:09,917 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:10,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:10,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 03:40:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:10,722 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:10,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833114631] [2022-02-15 03:40:10,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833114631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:10,722 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:10,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:40:10,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731020633] [2022-02-15 03:40:10,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:10,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:40:10,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:10,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:40:10,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:40:10,723 INFO L87 Difference]: Start difference. First operand 619 states and 755 transitions. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:13,227 INFO L93 Difference]: Finished difference Result 785 states and 947 transitions. [2022-02-15 03:40:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 03:40:13,227 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 03:40:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:13,229 INFO L225 Difference]: With dead ends: 785 [2022-02-15 03:40:13,229 INFO L226 Difference]: Without dead ends: 783 [2022-02-15 03:40:13,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=594, Invalid=4808, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 03:40:13,230 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 166 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:13,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 114 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:40:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-02-15 03:40:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 610. [2022-02-15 03:40:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 585 states have (on average 1.2222222222222223) internal successors, (715), 594 states have internal predecessors, (715), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 5 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-15 03:40:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 744 transitions. [2022-02-15 03:40:13,969 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 744 transitions. Word has length 61 [2022-02-15 03:40:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:13,969 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 744 transitions. [2022-02-15 03:40:13,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 744 transitions. [2022-02-15 03:40:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 03:40:13,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:13,971 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:13,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 03:40:13,971 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:13,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:13,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1930573552, now seen corresponding path program 18 times [2022-02-15 03:40:13,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:13,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608216461] [2022-02-15 03:40:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:13,972 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:13,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:13,974 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:14,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:14,654 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:14,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608216461] [2022-02-15 03:40:14,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [608216461] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:14,654 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:14,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:40:14,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957628258] [2022-02-15 03:40:14,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:14,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:40:14,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:40:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:40:14,655 INFO L87 Difference]: Start difference. First operand 610 states and 744 transitions. Second operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:17,685 INFO L93 Difference]: Finished difference Result 859 states and 1048 transitions. [2022-02-15 03:40:17,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 03:40:17,685 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 03:40:17,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:17,687 INFO L225 Difference]: With dead ends: 859 [2022-02-15 03:40:17,687 INFO L226 Difference]: Without dead ends: 857 [2022-02-15 03:40:17,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=722, Invalid=4390, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 03:40:17,688 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 550 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:17,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 86 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:40:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-02-15 03:40:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 629. [2022-02-15 03:40:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 604 states have (on average 1.2251655629139073) internal successors, (740), 613 states have internal predecessors, (740), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 5 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-15 03:40:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 769 transitions. [2022-02-15 03:40:18,302 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 769 transitions. Word has length 60 [2022-02-15 03:40:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:18,302 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 769 transitions. [2022-02-15 03:40:18,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 769 transitions. [2022-02-15 03:40:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 03:40:18,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:18,303 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:18,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 03:40:18,303 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1750933991, now seen corresponding path program 8 times [2022-02-15 03:40:18,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:18,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669771843] [2022-02-15 03:40:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:18,305 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:18,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:18,306 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:18,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 03:40:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:18,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 03:40:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:18,833 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:18,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669771843] [2022-02-15 03:40:18,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1669771843] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:18,834 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:18,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:40:18,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004242040] [2022-02-15 03:40:18,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:18,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:40:18,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:40:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:40:18,834 INFO L87 Difference]: Start difference. First operand 629 states and 769 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:40:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:20,358 INFO L93 Difference]: Finished difference Result 705 states and 857 transitions. [2022-02-15 03:40:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 03:40:20,359 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2022-02-15 03:40:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:20,378 INFO L225 Difference]: With dead ends: 705 [2022-02-15 03:40:20,378 INFO L226 Difference]: Without dead ends: 703 [2022-02-15 03:40:20,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=2450, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 03:40:20,379 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 162 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:20,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 67 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:40:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-02-15 03:40:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 671. [2022-02-15 03:40:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 642 states have (on average 1.222741433021807) internal successors, (785), 652 states have internal predecessors, (785), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 03:40:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 820 transitions. [2022-02-15 03:40:21,311 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 820 transitions. Word has length 63 [2022-02-15 03:40:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:21,311 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 820 transitions. [2022-02-15 03:40:21,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:40:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 820 transitions. [2022-02-15 03:40:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 03:40:21,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:21,314 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:21,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 03:40:21,314 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1632684826, now seen corresponding path program 15 times [2022-02-15 03:40:21,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:21,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26965498] [2022-02-15 03:40:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:21,316 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:21,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:21,318 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:21,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:21,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:21,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26965498] [2022-02-15 03:40:21,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [26965498] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:21,719 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:21,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:40:21,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235472368] [2022-02-15 03:40:21,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:21,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:40:21,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:21,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:40:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:40:21,720 INFO L87 Difference]: Start difference. First operand 671 states and 820 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:24,398 INFO L93 Difference]: Finished difference Result 907 states and 1106 transitions. [2022-02-15 03:40:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 03:40:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 03:40:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:24,401 INFO L225 Difference]: With dead ends: 907 [2022-02-15 03:40:24,401 INFO L226 Difference]: Without dead ends: 855 [2022-02-15 03:40:24,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1188, Invalid=4362, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 03:40:24,401 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 286 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:24,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 73 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:40:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-02-15 03:40:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 673. [2022-02-15 03:40:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 645 states have (on average 1.22015503875969) internal successors, (787), 654 states have internal predecessors, (787), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 03:40:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 820 transitions. [2022-02-15 03:40:25,182 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 820 transitions. Word has length 61 [2022-02-15 03:40:25,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:25,182 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 820 transitions. [2022-02-15 03:40:25,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 820 transitions. [2022-02-15 03:40:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 03:40:25,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:25,183 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:25,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 03:40:25,184 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:25,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:25,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1542934108, now seen corresponding path program 19 times [2022-02-15 03:40:25,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:25,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874327769] [2022-02-15 03:40:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:25,186 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:25,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:25,190 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:26,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:26,004 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:26,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874327769] [2022-02-15 03:40:26,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874327769] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:26,004 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:26,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:40:26,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734052333] [2022-02-15 03:40:26,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:26,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:40:26,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:40:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:40:26,005 INFO L87 Difference]: Start difference. First operand 673 states and 820 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:28,690 INFO L93 Difference]: Finished difference Result 796 states and 964 transitions. [2022-02-15 03:40:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 03:40:28,691 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 03:40:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:28,693 INFO L225 Difference]: With dead ends: 796 [2022-02-15 03:40:28,693 INFO L226 Difference]: Without dead ends: 794 [2022-02-15 03:40:28,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=481, Invalid=4075, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 03:40:28,694 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 198 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:28,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 144 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:40:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-02-15 03:40:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 698. [2022-02-15 03:40:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 668 states have (on average 1.220059880239521) internal successors, (815), 678 states have internal predecessors, (815), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 03:40:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 850 transitions. [2022-02-15 03:40:29,442 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 850 transitions. Word has length 61 [2022-02-15 03:40:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:29,442 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 850 transitions. [2022-02-15 03:40:29,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 850 transitions. [2022-02-15 03:40:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 03:40:29,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:29,443 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:29,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 03:40:29,443 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:29,443 INFO L85 PathProgramCache]: Analyzing trace with hash 747738716, now seen corresponding path program 16 times [2022-02-15 03:40:29,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:29,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394599670] [2022-02-15 03:40:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:29,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:29,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:29,446 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:29,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:29,990 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:29,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394599670] [2022-02-15 03:40:29,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394599670] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:29,990 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:29,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:40:29,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326485274] [2022-02-15 03:40:29,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:29,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:40:29,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:40:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:40:29,992 INFO L87 Difference]: Start difference. First operand 698 states and 850 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:32,182 INFO L93 Difference]: Finished difference Result 802 states and 973 transitions. [2022-02-15 03:40:32,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 03:40:32,195 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 03:40:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:32,198 INFO L225 Difference]: With dead ends: 802 [2022-02-15 03:40:32,198 INFO L226 Difference]: Without dead ends: 800 [2022-02-15 03:40:32,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=374, Invalid=2818, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 03:40:32,199 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 196 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:32,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 92 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:40:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-02-15 03:40:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 710. [2022-02-15 03:40:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 680 states have (on average 1.2220588235294119) internal successors, (831), 690 states have internal predecessors, (831), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 03:40:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 866 transitions. [2022-02-15 03:40:33,002 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 866 transitions. Word has length 61 [2022-02-15 03:40:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:33,003 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 866 transitions. [2022-02-15 03:40:33,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 866 transitions. [2022-02-15 03:40:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 03:40:33,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:33,004 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:33,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 03:40:33,004 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1042853094, now seen corresponding path program 17 times [2022-02-15 03:40:33,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:33,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596198507] [2022-02-15 03:40:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:33,007 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:33,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:33,008 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:33,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:33,672 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:33,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596198507] [2022-02-15 03:40:33,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596198507] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:33,672 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:33,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:40:33,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339911431] [2022-02-15 03:40:33,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:33,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:40:33,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:33,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:40:33,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:40:33,673 INFO L87 Difference]: Start difference. First operand 710 states and 866 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:36,311 INFO L93 Difference]: Finished difference Result 846 states and 1026 transitions. [2022-02-15 03:40:36,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 03:40:36,311 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 03:40:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:36,314 INFO L225 Difference]: With dead ends: 846 [2022-02-15 03:40:36,314 INFO L226 Difference]: Without dead ends: 844 [2022-02-15 03:40:36,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=486, Invalid=3674, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 03:40:36,315 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 183 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:36,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 75 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:40:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-02-15 03:40:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 692. [2022-02-15 03:40:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 662 states have (on average 1.2190332326283988) internal successors, (807), 672 states have internal predecessors, (807), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 03:40:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 842 transitions. [2022-02-15 03:40:37,007 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 842 transitions. Word has length 61 [2022-02-15 03:40:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:37,007 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 842 transitions. [2022-02-15 03:40:37,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 842 transitions. [2022-02-15 03:40:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 03:40:37,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:37,008 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:37,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 03:40:37,008 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash -171237983, now seen corresponding path program 6 times [2022-02-15 03:40:37,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:37,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157931530] [2022-02-15 03:40:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:37,010 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:37,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:37,012 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:37,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:37,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 03:40:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:37,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 03:40:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:37,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 03:40:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:37,145 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:37,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157931530] [2022-02-15 03:40:37,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1157931530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:37,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:37,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:40:37,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4168524] [2022-02-15 03:40:37,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:37,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:40:37,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:37,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:40:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:40:37,146 INFO L87 Difference]: Start difference. First operand 692 states and 842 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 03:40:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:38,296 INFO L93 Difference]: Finished difference Result 729 states and 885 transitions. [2022-02-15 03:40:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:40:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2022-02-15 03:40:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:38,298 INFO L225 Difference]: With dead ends: 729 [2022-02-15 03:40:38,298 INFO L226 Difference]: Without dead ends: 674 [2022-02-15 03:40:38,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:40:38,300 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 159 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:38,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 85 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:40:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-02-15 03:40:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 639. [2022-02-15 03:40:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 614 states have (on average 1.1872964169381108) internal successors, (729), 622 states have internal predecessors, (729), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 7 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-15 03:40:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 759 transitions. [2022-02-15 03:40:38,938 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 759 transitions. Word has length 65 [2022-02-15 03:40:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:38,938 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 759 transitions. [2022-02-15 03:40:38,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 03:40:38,938 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 759 transitions. [2022-02-15 03:40:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 03:40:38,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:38,939 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:38,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 03:40:38,939 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:38,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash 972338910, now seen corresponding path program 9 times [2022-02-15 03:40:38,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:38,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502617618] [2022-02-15 03:40:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:38,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:38,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:38,942 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:39,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:39,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 03:40:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:39,207 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:39,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502617618] [2022-02-15 03:40:39,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502617618] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:39,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:39,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 03:40:39,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981904153] [2022-02-15 03:40:39,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:39,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 03:40:39,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:39,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 03:40:39,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:40:39,208 INFO L87 Difference]: Start difference. First operand 639 states and 759 transitions. Second operand has 20 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:41,851 INFO L93 Difference]: Finished difference Result 867 states and 1035 transitions. [2022-02-15 03:40:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 03:40:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-15 03:40:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:41,856 INFO L225 Difference]: With dead ends: 867 [2022-02-15 03:40:41,856 INFO L226 Difference]: Without dead ends: 865 [2022-02-15 03:40:41,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 03:40:41,857 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 251 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:41,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 119 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:40:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-02-15 03:40:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 695. [2022-02-15 03:40:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 664 states have (on average 1.1852409638554218) internal successors, (787), 676 states have internal predecessors, (787), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (19), 8 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 03:40:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 827 transitions. [2022-02-15 03:40:42,625 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 827 transitions. Word has length 63 [2022-02-15 03:40:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:42,625 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 827 transitions. [2022-02-15 03:40:42,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 827 transitions. [2022-02-15 03:40:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 03:40:42,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:42,626 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:42,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 03:40:42,627 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:42,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:42,627 INFO L85 PathProgramCache]: Analyzing trace with hash 736626974, now seen corresponding path program 10 times [2022-02-15 03:40:42,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:42,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480718136] [2022-02-15 03:40:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:42,628 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:42,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:42,629 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:43,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 03:40:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:43,070 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:43,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480718136] [2022-02-15 03:40:43,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1480718136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:43,070 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:43,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:40:43,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017311957] [2022-02-15 03:40:43,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:43,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:40:43,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:40:43,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:40:43,071 INFO L87 Difference]: Start difference. First operand 695 states and 827 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:45,339 INFO L93 Difference]: Finished difference Result 756 states and 897 transitions. [2022-02-15 03:40:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 03:40:45,339 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-15 03:40:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:45,351 INFO L225 Difference]: With dead ends: 756 [2022-02-15 03:40:45,352 INFO L226 Difference]: Without dead ends: 754 [2022-02-15 03:40:45,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=531, Invalid=3891, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 03:40:45,352 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 274 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:45,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 109 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:40:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-02-15 03:40:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 718. [2022-02-15 03:40:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 685 states have (on average 1.1854014598540146) internal successors, (812), 697 states have internal predecessors, (812), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 9 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-15 03:40:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 854 transitions. [2022-02-15 03:40:46,158 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 854 transitions. Word has length 63 [2022-02-15 03:40:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:46,158 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 854 transitions. [2022-02-15 03:40:46,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 854 transitions. [2022-02-15 03:40:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 03:40:46,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:46,159 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:46,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 03:40:46,160 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:46,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:46,160 INFO L85 PathProgramCache]: Analyzing trace with hash -578416814, now seen corresponding path program 11 times [2022-02-15 03:40:46,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:46,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234958754] [2022-02-15 03:40:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:46,161 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:46,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:46,162 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:46,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:46,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 03:40:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:46,771 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:46,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234958754] [2022-02-15 03:40:46,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [234958754] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:46,771 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:46,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:40:46,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335291602] [2022-02-15 03:40:46,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:46,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:40:46,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:46,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:40:46,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:40:46,772 INFO L87 Difference]: Start difference. First operand 718 states and 854 transitions. Second operand has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:49,410 INFO L93 Difference]: Finished difference Result 773 states and 917 transitions. [2022-02-15 03:40:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 03:40:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-15 03:40:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:49,412 INFO L225 Difference]: With dead ends: 773 [2022-02-15 03:40:49,412 INFO L226 Difference]: Without dead ends: 771 [2022-02-15 03:40:49,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=498, Invalid=4058, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 03:40:49,413 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 189 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:49,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 130 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:40:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-02-15 03:40:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 700. [2022-02-15 03:40:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 668 states have (on average 1.18562874251497) internal successors, (792), 679 states have internal predecessors, (792), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 9 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 03:40:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 832 transitions. [2022-02-15 03:40:50,163 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 832 transitions. Word has length 63 [2022-02-15 03:40:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:50,164 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 832 transitions. [2022-02-15 03:40:50,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 832 transitions. [2022-02-15 03:40:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 03:40:50,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:50,165 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:50,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 03:40:50,165 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1107936288, now seen corresponding path program 9 times [2022-02-15 03:40:50,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:50,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763959645] [2022-02-15 03:40:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:50,166 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:50,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:50,168 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:50,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:50,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 03:40:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:50,891 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:50,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763959645] [2022-02-15 03:40:50,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [763959645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:50,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:50,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 03:40:50,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167866785] [2022-02-15 03:40:50,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:50,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 03:40:50,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:50,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 03:40:50,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:40:50,892 INFO L87 Difference]: Start difference. First operand 700 states and 832 transitions. Second operand has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:53,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:53,567 INFO L93 Difference]: Finished difference Result 843 states and 999 transitions. [2022-02-15 03:40:53,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 03:40:53,568 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-15 03:40:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:53,569 INFO L225 Difference]: With dead ends: 843 [2022-02-15 03:40:53,569 INFO L226 Difference]: Without dead ends: 841 [2022-02-15 03:40:53,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=732, Invalid=5430, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 03:40:53,570 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 151 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:53,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 121 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:40:53,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-02-15 03:40:54,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 739. [2022-02-15 03:40:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 707 states have (on average 1.1867043847241867) internal successors, (839), 718 states have internal predecessors, (839), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 9 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 03:40:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 879 transitions. [2022-02-15 03:40:54,404 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 879 transitions. Word has length 63 [2022-02-15 03:40:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:54,405 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 879 transitions. [2022-02-15 03:40:54,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 879 transitions. [2022-02-15 03:40:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 03:40:54,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:54,406 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:54,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 03:40:54,407 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:54,407 INFO L85 PathProgramCache]: Analyzing trace with hash -645721556, now seen corresponding path program 10 times [2022-02-15 03:40:54,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:54,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058646238] [2022-02-15 03:40:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:54,408 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:54,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:54,410 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:55,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:55,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 03:40:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:55,198 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:55,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058646238] [2022-02-15 03:40:55,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058646238] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:55,199 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:55,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 03:40:55,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813939539] [2022-02-15 03:40:55,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:55,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 03:40:55,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 03:40:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:40:55,200 INFO L87 Difference]: Start difference. First operand 739 states and 879 transitions. Second operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:57,871 INFO L93 Difference]: Finished difference Result 783 states and 928 transitions. [2022-02-15 03:40:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 03:40:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 03:40:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:57,873 INFO L225 Difference]: With dead ends: 783 [2022-02-15 03:40:57,873 INFO L226 Difference]: Without dead ends: 781 [2022-02-15 03:40:57,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=613, Invalid=4937, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 03:40:57,874 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 174 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:57,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 107 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:40:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-02-15 03:40:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 735. [2022-02-15 03:40:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 704 states have (on average 1.1875) internal successors, (836), 715 states have internal predecessors, (836), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-15 03:40:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 874 transitions. [2022-02-15 03:40:58,898 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 874 transitions. Word has length 64 [2022-02-15 03:40:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:58,898 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 874 transitions. [2022-02-15 03:40:58,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:40:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 874 transitions. [2022-02-15 03:40:58,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 03:40:58,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:58,900 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:58,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 03:40:58,900 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1217741736, now seen corresponding path program 7 times [2022-02-15 03:40:58,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:58,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534265120] [2022-02-15 03:40:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:58,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:58,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:58,903 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:59,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:59,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 03:40:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:59,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 03:40:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:59,296 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:59,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534265120] [2022-02-15 03:40:59,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [534265120] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:59,296 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:59,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:40:59,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154670888] [2022-02-15 03:40:59,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:59,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:40:59,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:59,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:40:59,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:40:59,297 INFO L87 Difference]: Start difference. First operand 735 states and 874 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:41:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:01,479 INFO L93 Difference]: Finished difference Result 843 states and 1006 transitions. [2022-02-15 03:41:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 03:41:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-02-15 03:41:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:01,487 INFO L225 Difference]: With dead ends: 843 [2022-02-15 03:41:01,487 INFO L226 Difference]: Without dead ends: 841 [2022-02-15 03:41:01,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 03:41:01,488 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 269 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:01,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 74 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:41:01,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-02-15 03:41:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 810. [2022-02-15 03:41:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 769 states have (on average 1.1833550065019507) internal successors, (910), 786 states have internal predecessors, (910), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-15 03:41:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 966 transitions. [2022-02-15 03:41:02,743 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 966 transitions. Word has length 65 [2022-02-15 03:41:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:02,743 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 966 transitions. [2022-02-15 03:41:02,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:41:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 966 transitions. [2022-02-15 03:41:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 03:41:02,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:02,745 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:02,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 03:41:02,745 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash 775255317, now seen corresponding path program 20 times [2022-02-15 03:41:02,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:02,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122287648] [2022-02-15 03:41:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:02,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:02,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:02,749 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:03,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:03,736 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:03,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122287648] [2022-02-15 03:41:03,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122287648] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:03,737 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:03,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:41:03,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265190056] [2022-02-15 03:41:03,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:03,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:41:03,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:03,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:41:03,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:41:03,738 INFO L87 Difference]: Start difference. First operand 810 states and 966 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:07,045 INFO L93 Difference]: Finished difference Result 1093 states and 1312 transitions. [2022-02-15 03:41:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 03:41:07,045 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-15 03:41:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:07,058 INFO L225 Difference]: With dead ends: 1093 [2022-02-15 03:41:07,059 INFO L226 Difference]: Without dead ends: 1091 [2022-02-15 03:41:07,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=602, Invalid=4948, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 03:41:07,060 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 382 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:07,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 104 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:41:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-02-15 03:41:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 869. [2022-02-15 03:41:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 825 states have (on average 1.187878787878788) internal successors, (980), 844 states have internal predecessors, (980), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (29), 11 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-15 03:41:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1040 transitions. [2022-02-15 03:41:08,116 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1040 transitions. Word has length 63 [2022-02-15 03:41:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:08,116 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1040 transitions. [2022-02-15 03:41:08,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:08,116 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1040 transitions. [2022-02-15 03:41:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 03:41:08,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:08,118 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:08,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 03:41:08,118 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 78615171, now seen corresponding path program 21 times [2022-02-15 03:41:08,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:08,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442326504] [2022-02-15 03:41:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:08,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:08,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:08,121 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:08,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:08,851 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:08,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442326504] [2022-02-15 03:41:08,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [442326504] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:08,851 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:08,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 03:41:08,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290992251] [2022-02-15 03:41:08,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:08,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 03:41:08,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:08,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 03:41:08,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:41:08,853 INFO L87 Difference]: Start difference. First operand 869 states and 1040 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:13,508 INFO L93 Difference]: Finished difference Result 1197 states and 1447 transitions. [2022-02-15 03:41:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 03:41:13,508 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-15 03:41:13,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:13,510 INFO L225 Difference]: With dead ends: 1197 [2022-02-15 03:41:13,510 INFO L226 Difference]: Without dead ends: 1195 [2022-02-15 03:41:13,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=877, Invalid=5129, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 03:41:13,511 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 574 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:13,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 82 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 03:41:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-02-15 03:41:14,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 916. [2022-02-15 03:41:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 867 states have (on average 1.1880046136101499) internal successors, (1030), 889 states have internal predecessors, (1030), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (32), 11 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-15 03:41:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1096 transitions. [2022-02-15 03:41:14,642 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1096 transitions. Word has length 63 [2022-02-15 03:41:14,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:14,642 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1096 transitions. [2022-02-15 03:41:14,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:14,642 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1096 transitions. [2022-02-15 03:41:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:41:14,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:14,644 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:14,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 03:41:14,644 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash -500007896, now seen corresponding path program 11 times [2022-02-15 03:41:14,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:14,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217497969] [2022-02-15 03:41:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:14,645 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:14,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:14,647 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:15,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:15,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 03:41:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:15,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 03:41:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:15,340 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:15,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217497969] [2022-02-15 03:41:15,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [217497969] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:15,340 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:15,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:41:15,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899398904] [2022-02-15 03:41:15,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:15,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:41:15,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:41:15,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:41:15,341 INFO L87 Difference]: Start difference. First operand 916 states and 1096 transitions. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:41:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:18,786 INFO L93 Difference]: Finished difference Result 967 states and 1154 transitions. [2022-02-15 03:41:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 03:41:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2022-02-15 03:41:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:18,791 INFO L225 Difference]: With dead ends: 967 [2022-02-15 03:41:18,791 INFO L226 Difference]: Without dead ends: 907 [2022-02-15 03:41:18,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=679, Invalid=5173, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 03:41:18,792 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 164 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:18,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 121 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:41:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-02-15 03:41:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 809. [2022-02-15 03:41:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 767 states have (on average 1.1890482398956974) internal successors, (912), 784 states have internal predecessors, (912), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 10 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-15 03:41:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 966 transitions. [2022-02-15 03:41:20,061 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 966 transitions. Word has length 66 [2022-02-15 03:41:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:20,061 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 966 transitions. [2022-02-15 03:41:20,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:41:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 966 transitions. [2022-02-15 03:41:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:41:20,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:20,063 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:20,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 03:41:20,064 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:20,064 INFO L85 PathProgramCache]: Analyzing trace with hash -683336596, now seen corresponding path program 12 times [2022-02-15 03:41:20,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:20,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224618762] [2022-02-15 03:41:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:20,065 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:20,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:20,067 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:20,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:20,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 03:41:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:20,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 03:41:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:20,775 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:20,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224618762] [2022-02-15 03:41:20,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [224618762] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:20,775 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:20,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 03:41:20,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324318421] [2022-02-15 03:41:20,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:20,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 03:41:20,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 03:41:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:41:20,776 INFO L87 Difference]: Start difference. First operand 809 states and 966 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:41:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:22,907 INFO L93 Difference]: Finished difference Result 843 states and 1005 transitions. [2022-02-15 03:41:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 03:41:22,907 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2022-02-15 03:41:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:22,916 INFO L225 Difference]: With dead ends: 843 [2022-02-15 03:41:22,916 INFO L226 Difference]: Without dead ends: 823 [2022-02-15 03:41:22,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=2642, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 03:41:22,916 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 134 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:22,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 116 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:41:22,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-02-15 03:41:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 809. [2022-02-15 03:41:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 767 states have (on average 1.1877444589308996) internal successors, (911), 784 states have internal predecessors, (911), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 10 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-15 03:41:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 965 transitions. [2022-02-15 03:41:23,836 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 965 transitions. Word has length 66 [2022-02-15 03:41:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:23,836 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 965 transitions. [2022-02-15 03:41:23,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:41:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 965 transitions. [2022-02-15 03:41:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 03:41:23,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:23,837 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:23,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 03:41:23,837 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:23,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1145647575, now seen corresponding path program 18 times [2022-02-15 03:41:23,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:23,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160865957] [2022-02-15 03:41:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:23,839 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:23,840 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:24,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:24,408 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:24,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160865957] [2022-02-15 03:41:24,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160865957] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:24,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:24,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:41:24,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130686534] [2022-02-15 03:41:24,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:24,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:41:24,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:24,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:41:24,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:41:24,410 INFO L87 Difference]: Start difference. First operand 809 states and 965 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:27,361 INFO L93 Difference]: Finished difference Result 889 states and 1056 transitions. [2022-02-15 03:41:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 03:41:27,362 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 03:41:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:27,364 INFO L225 Difference]: With dead ends: 889 [2022-02-15 03:41:27,364 INFO L226 Difference]: Without dead ends: 887 [2022-02-15 03:41:27,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=437, Invalid=3469, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 03:41:27,365 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 219 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:27,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 118 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:41:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-02-15 03:41:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 819. [2022-02-15 03:41:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 776 states have (on average 1.1868556701030928) internal successors, (921), 793 states have internal predecessors, (921), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (26), 10 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-15 03:41:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 975 transitions. [2022-02-15 03:41:28,770 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 975 transitions. Word has length 64 [2022-02-15 03:41:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:28,770 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 975 transitions. [2022-02-15 03:41:28,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 975 transitions. [2022-02-15 03:41:28,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 03:41:28,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:28,772 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:28,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 03:41:28,772 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:28,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:28,773 INFO L85 PathProgramCache]: Analyzing trace with hash -571362225, now seen corresponding path program 8 times [2022-02-15 03:41:28,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:28,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163586136] [2022-02-15 03:41:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:28,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:28,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:28,776 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:29,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 03:41:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:29,141 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:29,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163586136] [2022-02-15 03:41:29,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [163586136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:29,142 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:29,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:41:29,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433221575] [2022-02-15 03:41:29,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:29,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:41:29,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:29,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:41:29,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:41:29,142 INFO L87 Difference]: Start difference. First operand 819 states and 975 transitions. Second operand has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:41:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:31,081 INFO L93 Difference]: Finished difference Result 867 states and 1031 transitions. [2022-02-15 03:41:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:41:31,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-02-15 03:41:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:31,083 INFO L225 Difference]: With dead ends: 867 [2022-02-15 03:41:31,083 INFO L226 Difference]: Without dead ends: 865 [2022-02-15 03:41:31,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:41:31,083 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:31,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 92 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:41:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-02-15 03:41:32,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 823. [2022-02-15 03:41:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 780 states have (on average 1.1884615384615385) internal successors, (927), 796 states have internal predecessors, (927), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (26), 11 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-15 03:41:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 981 transitions. [2022-02-15 03:41:32,529 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 981 transitions. Word has length 65 [2022-02-15 03:41:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:32,529 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 981 transitions. [2022-02-15 03:41:32,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:41:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 981 transitions. [2022-02-15 03:41:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:41:32,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:32,531 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:32,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 03:41:32,531 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:32,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:32,531 INFO L85 PathProgramCache]: Analyzing trace with hash 781141083, now seen corresponding path program 13 times [2022-02-15 03:41:32,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:32,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308822479] [2022-02-15 03:41:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:32,532 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:32,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:32,534 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:33,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:33,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 03:41:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:33,013 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:33,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308822479] [2022-02-15 03:41:33,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308822479] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:33,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:33,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 03:41:33,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631611693] [2022-02-15 03:41:33,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:33,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 03:41:33,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 03:41:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:41:33,015 INFO L87 Difference]: Start difference. First operand 823 states and 981 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:41:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:36,781 INFO L93 Difference]: Finished difference Result 991 states and 1183 transitions. [2022-02-15 03:41:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 03:41:36,782 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-15 03:41:36,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:36,783 INFO L225 Difference]: With dead ends: 991 [2022-02-15 03:41:36,783 INFO L226 Difference]: Without dead ends: 989 [2022-02-15 03:41:36,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=914, Invalid=5092, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 03:41:36,784 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 282 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:36,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 119 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:41:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-02-15 03:41:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 832. [2022-02-15 03:41:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 788 states have (on average 1.1878172588832487) internal successors, (936), 805 states have internal predecessors, (936), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-15 03:41:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 992 transitions. [2022-02-15 03:41:37,951 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 992 transitions. Word has length 66 [2022-02-15 03:41:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:37,952 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 992 transitions. [2022-02-15 03:41:37,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:41:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 992 transitions. [2022-02-15 03:41:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:41:37,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:37,953 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:37,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 03:41:37,953 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:37,953 INFO L85 PathProgramCache]: Analyzing trace with hash 958384667, now seen corresponding path program 14 times [2022-02-15 03:41:37,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:37,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777023788] [2022-02-15 03:41:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:37,954 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:37,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:37,956 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:38,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:38,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 03:41:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:38,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:38,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777023788] [2022-02-15 03:41:38,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777023788] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:38,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:38,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:41:38,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192801237] [2022-02-15 03:41:38,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:38,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:41:38,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:38,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:41:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:41:38,340 INFO L87 Difference]: Start difference. First operand 832 states and 992 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:41:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:41,586 INFO L93 Difference]: Finished difference Result 958 states and 1138 transitions. [2022-02-15 03:41:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 03:41:41,586 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-15 03:41:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:41,588 INFO L225 Difference]: With dead ends: 958 [2022-02-15 03:41:41,588 INFO L226 Difference]: Without dead ends: 956 [2022-02-15 03:41:41,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=604, Invalid=4366, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 03:41:41,589 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 165 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:41,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 131 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:41:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-02-15 03:41:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 838. [2022-02-15 03:41:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 794 states have (on average 1.1889168765743072) internal successors, (944), 811 states have internal predecessors, (944), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-15 03:41:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1000 transitions. [2022-02-15 03:41:42,971 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1000 transitions. Word has length 66 [2022-02-15 03:41:42,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:42,971 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1000 transitions. [2022-02-15 03:41:42,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:41:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1000 transitions. [2022-02-15 03:41:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:41:42,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:42,973 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:42,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 03:41:42,973 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:42,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash 276895843, now seen corresponding path program 12 times [2022-02-15 03:41:42,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:42,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402374785] [2022-02-15 03:41:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:42,976 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:42,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:42,978 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:43,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:43,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 03:41:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:43,838 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:43,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402374785] [2022-02-15 03:41:43,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [402374785] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:43,838 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:43,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 03:41:43,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141008344] [2022-02-15 03:41:43,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:43,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 03:41:43,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 03:41:43,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 03:41:43,840 INFO L87 Difference]: Start difference. First operand 838 states and 1000 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:41:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:49,308 INFO L93 Difference]: Finished difference Result 1060 states and 1258 transitions. [2022-02-15 03:41:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 03:41:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-15 03:41:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:49,310 INFO L225 Difference]: With dead ends: 1060 [2022-02-15 03:41:49,310 INFO L226 Difference]: Without dead ends: 1058 [2022-02-15 03:41:49,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2932 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1079, Invalid=8821, Unknown=0, NotChecked=0, Total=9900 [2022-02-15 03:41:49,312 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 282 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:49,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 115 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 03:41:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-02-15 03:41:50,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 882. [2022-02-15 03:41:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 835 states have (on average 1.1868263473053893) internal successors, (991), 853 states have internal predecessors, (991), 31 states have call successors, (31), 16 states have call predecessors, (31), 15 states have return successors, (29), 12 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-15 03:41:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1051 transitions. [2022-02-15 03:41:50,624 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1051 transitions. Word has length 66 [2022-02-15 03:41:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:50,624 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1051 transitions. [2022-02-15 03:41:50,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:41:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1051 transitions. [2022-02-15 03:41:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:41:50,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:50,626 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:50,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 03:41:50,626 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:50,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:50,627 INFO L85 PathProgramCache]: Analyzing trace with hash -614168551, now seen corresponding path program 13 times [2022-02-15 03:41:50,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:50,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502905870] [2022-02-15 03:41:50,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:50,628 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:50,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:50,629 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:51,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:51,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 03:41:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:51,544 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:51,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502905870] [2022-02-15 03:41:51,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502905870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:51,544 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:51,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 03:41:51,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965905103] [2022-02-15 03:41:51,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:51,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 03:41:51,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:51,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 03:41:51,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 03:41:51,545 INFO L87 Difference]: Start difference. First operand 882 states and 1051 transitions. Second operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:41:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:55,529 INFO L93 Difference]: Finished difference Result 1060 states and 1259 transitions. [2022-02-15 03:41:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 03:41:55,530 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-15 03:41:55,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:55,531 INFO L225 Difference]: With dead ends: 1060 [2022-02-15 03:41:55,532 INFO L226 Difference]: Without dead ends: 1058 [2022-02-15 03:41:55,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2872 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=878, Invalid=8052, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 03:41:55,532 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 262 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2439 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:55,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 97 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2439 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:41:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-02-15 03:41:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 894. [2022-02-15 03:41:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 847 states have (on average 1.1877213695395514) internal successors, (1006), 865 states have internal predecessors, (1006), 31 states have call successors, (31), 16 states have call predecessors, (31), 15 states have return successors, (29), 12 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-15 03:41:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1066 transitions. [2022-02-15 03:41:56,699 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1066 transitions. Word has length 66 [2022-02-15 03:41:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:56,699 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1066 transitions. [2022-02-15 03:41:56,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:41:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1066 transitions. [2022-02-15 03:41:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:41:56,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:56,701 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:56,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 03:41:56,702 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash 610957489, now seen corresponding path program 14 times [2022-02-15 03:41:56,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:56,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114614988] [2022-02-15 03:41:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:56,704 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:56,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:56,705 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:57,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:57,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 03:41:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:57,431 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:57,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114614988] [2022-02-15 03:41:57,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114614988] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:57,431 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:57,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 03:41:57,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649183016] [2022-02-15 03:41:57,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:57,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 03:41:57,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:57,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 03:41:57,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:41:57,433 INFO L87 Difference]: Start difference. First operand 894 states and 1066 transitions. Second operand has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:42:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:00,193 INFO L93 Difference]: Finished difference Result 951 states and 1128 transitions. [2022-02-15 03:42:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 03:42:00,194 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-15 03:42:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:00,196 INFO L225 Difference]: With dead ends: 951 [2022-02-15 03:42:00,196 INFO L226 Difference]: Without dead ends: 949 [2022-02-15 03:42:00,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=508, Invalid=3782, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 03:42:00,197 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 147 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:00,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 84 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:42:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-02-15 03:42:01,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 878. [2022-02-15 03:42:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 833 states have (on average 1.1884753901560625) internal successors, (990), 850 states have internal predecessors, (990), 29 states have call successors, (29), 16 states have call predecessors, (29), 15 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-15 03:42:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1046 transitions. [2022-02-15 03:42:01,592 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1046 transitions. Word has length 66 [2022-02-15 03:42:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:01,593 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1046 transitions. [2022-02-15 03:42:01,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:42:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1046 transitions. [2022-02-15 03:42:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:42:01,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:01,594 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:42:01,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 03:42:01,595 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:01,596 INFO L85 PathProgramCache]: Analyzing trace with hash -275259755, now seen corresponding path program 15 times [2022-02-15 03:42:01,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:01,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508457766] [2022-02-15 03:42:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:01,597 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:01,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:01,599 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:02,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:02,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 03:42:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:02,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 03:42:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:02,180 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:02,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508457766] [2022-02-15 03:42:02,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508457766] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:02,181 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:02,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:42:02,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279130049] [2022-02-15 03:42:02,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:02,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:42:02,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:42:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:42:02,182 INFO L87 Difference]: Start difference. First operand 878 states and 1046 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:42:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:05,404 INFO L93 Difference]: Finished difference Result 1056 states and 1260 transitions. [2022-02-15 03:42:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 03:42:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-02-15 03:42:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:05,406 INFO L225 Difference]: With dead ends: 1056 [2022-02-15 03:42:05,406 INFO L226 Difference]: Without dead ends: 1054 [2022-02-15 03:42:05,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=453, Invalid=3207, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 03:42:05,407 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 228 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:05,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 121 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:42:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-02-15 03:42:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 932. [2022-02-15 03:42:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 877 states have (on average 1.1812998859749144) internal successors, (1036), 901 states have internal predecessors, (1036), 39 states have call successors, (39), 16 states have call predecessors, (39), 15 states have return successors, (37), 14 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-15 03:42:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1112 transitions. [2022-02-15 03:42:06,749 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1112 transitions. Word has length 68 [2022-02-15 03:42:06,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:06,749 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1112 transitions. [2022-02-15 03:42:06,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:42:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1112 transitions. [2022-02-15 03:42:06,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:42:06,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:06,750 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:42:06,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 03:42:06,751 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:06,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1734012123, now seen corresponding path program 16 times [2022-02-15 03:42:06,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:06,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11823403] [2022-02-15 03:42:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:06,752 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:06,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:06,753 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:07,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:07,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 03:42:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:07,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 03:42:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:07,180 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:07,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11823403] [2022-02-15 03:42:07,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [11823403] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:07,180 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:07,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:42:07,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122147574] [2022-02-15 03:42:07,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:07,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:42:07,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:07,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:42:07,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:42:07,184 INFO L87 Difference]: Start difference. First operand 932 states and 1112 transitions. Second operand has 22 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:42:09,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:09,793 INFO L93 Difference]: Finished difference Result 988 states and 1178 transitions. [2022-02-15 03:42:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:42:09,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-02-15 03:42:09,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:09,796 INFO L225 Difference]: With dead ends: 988 [2022-02-15 03:42:09,797 INFO L226 Difference]: Without dead ends: 986 [2022-02-15 03:42:09,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=1570, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:42:09,797 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 126 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:09,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 85 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:42:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-02-15 03:42:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 926. [2022-02-15 03:42:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 872 states have (on average 1.1823394495412844) internal successors, (1031), 895 states have internal predecessors, (1031), 38 states have call successors, (38), 16 states have call predecessors, (38), 15 states have return successors, (36), 14 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-15 03:42:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1105 transitions. [2022-02-15 03:42:11,649 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1105 transitions. Word has length 68 [2022-02-15 03:42:11,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:11,649 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1105 transitions. [2022-02-15 03:42:11,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:42:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1105 transitions. [2022-02-15 03:42:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:42:11,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:11,651 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:42:11,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 03:42:11,651 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:11,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1737340720, now seen corresponding path program 22 times [2022-02-15 03:42:11,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:11,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385781305] [2022-02-15 03:42:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:11,653 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:11,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:11,655 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:12,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:12,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:12,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385781305] [2022-02-15 03:42:12,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1385781305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:12,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:12,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 03:42:12,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074782685] [2022-02-15 03:42:12,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:12,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 03:42:12,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 03:42:12,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:42:12,599 INFO L87 Difference]: Start difference. First operand 926 states and 1105 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-02-15 03:42:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:17,651 INFO L93 Difference]: Finished difference Result 1266 states and 1520 transitions. [2022-02-15 03:42:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 03:42:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 [2022-02-15 03:42:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:17,655 INFO L225 Difference]: With dead ends: 1266 [2022-02-15 03:42:17,655 INFO L226 Difference]: Without dead ends: 1264 [2022-02-15 03:42:17,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=727, Invalid=6755, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 03:42:17,656 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 409 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:17,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 110 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 03:42:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-02-15 03:42:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 989. [2022-02-15 03:42:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 928 states have (on average 1.1799568965517242) internal successors, (1095), 956 states have internal predecessors, (1095), 43 states have call successors, (43), 18 states have call predecessors, (43), 17 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-15 03:42:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1179 transitions. [2022-02-15 03:42:19,601 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1179 transitions. Word has length 66 [2022-02-15 03:42:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:19,602 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1179 transitions. [2022-02-15 03:42:19,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-02-15 03:42:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1179 transitions. [2022-02-15 03:42:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:42:19,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:19,604 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:42:19,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 03:42:19,604 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash 688449750, now seen corresponding path program 23 times [2022-02-15 03:42:19,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:19,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171256180] [2022-02-15 03:42:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:19,605 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:19,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:19,607 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:20,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:20,092 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:20,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171256180] [2022-02-15 03:42:20,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171256180] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:20,092 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:20,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 03:42:20,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741585383] [2022-02-15 03:42:20,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:20,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 03:42:20,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:20,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 03:42:20,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:42:20,093 INFO L87 Difference]: Start difference. First operand 989 states and 1179 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 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) [2022-02-15 03:42:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:24,367 INFO L93 Difference]: Finished difference Result 1172 states and 1400 transitions. [2022-02-15 03:42:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 03:42:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 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 [2022-02-15 03:42:24,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:24,371 INFO L225 Difference]: With dead ends: 1172 [2022-02-15 03:42:24,371 INFO L226 Difference]: Without dead ends: 1170 [2022-02-15 03:42:24,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=739, Invalid=4811, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 03:42:24,372 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 302 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:24,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 112 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:42:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-02-15 03:42:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1005. [2022-02-15 03:42:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 942 states have (on average 1.1794055201698515) internal successors, (1111), 971 states have internal predecessors, (1111), 44 states have call successors, (44), 19 states have call predecessors, (44), 18 states have return successors, (42), 14 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-15 03:42:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1197 transitions. [2022-02-15 03:42:26,047 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1197 transitions. Word has length 66 [2022-02-15 03:42:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:26,047 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1197 transitions. [2022-02-15 03:42:26,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 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) [2022-02-15 03:42:26,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1197 transitions. [2022-02-15 03:42:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:42:26,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:26,049 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:42:26,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 03:42:26,049 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:26,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:26,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1136950192, now seen corresponding path program 24 times [2022-02-15 03:42:26,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:26,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125926547] [2022-02-15 03:42:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:26,051 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:26,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:26,053 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:26,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:26,860 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:26,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125926547] [2022-02-15 03:42:26,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125926547] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:26,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:26,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:42:26,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150851126] [2022-02-15 03:42:26,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:26,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:42:26,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:42:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:42:26,861 INFO L87 Difference]: Start difference. First operand 1005 states and 1197 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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) [2022-02-15 03:42:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:34,560 INFO L93 Difference]: Finished difference Result 1490 states and 1800 transitions. [2022-02-15 03:42:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 03:42:34,564 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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 [2022-02-15 03:42:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:34,567 INFO L225 Difference]: With dead ends: 1490 [2022-02-15 03:42:34,567 INFO L226 Difference]: Without dead ends: 1488 [2022-02-15 03:42:34,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1459, Invalid=10313, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 03:42:34,568 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 651 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:34,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 77 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 03:42:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-02-15 03:42:36,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 985. [2022-02-15 03:42:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 921 states have (on average 1.1769815418023888) internal successors, (1084), 950 states have internal predecessors, (1084), 44 states have call successors, (44), 20 states have call predecessors, (44), 19 states have return successors, (42), 14 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-15 03:42:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1170 transitions. [2022-02-15 03:42:36,259 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1170 transitions. Word has length 66 [2022-02-15 03:42:36,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:36,259 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1170 transitions. [2022-02-15 03:42:36,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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) [2022-02-15 03:42:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1170 transitions. [2022-02-15 03:42:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:42:36,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:36,260 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:42:36,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 03:42:36,260 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2061955934, now seen corresponding path program 25 times [2022-02-15 03:42:36,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:36,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973283459] [2022-02-15 03:42:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:36,262 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:36,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:36,263 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:36,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:36,860 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:36,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973283459] [2022-02-15 03:42:36,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [973283459] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:36,861 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:36,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:42:36,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276298821] [2022-02-15 03:42:36,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:36,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:42:36,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:36,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:42:36,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:42:36,861 INFO L87 Difference]: Start difference. First operand 985 states and 1170 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:40,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:40,408 INFO L93 Difference]: Finished difference Result 1111 states and 1323 transitions. [2022-02-15 03:42:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 03:42:40,409 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 03:42:40,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:40,411 INFO L225 Difference]: With dead ends: 1111 [2022-02-15 03:42:40,411 INFO L226 Difference]: Without dead ends: 1109 [2022-02-15 03:42:40,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=646, Invalid=3260, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 03:42:40,412 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 173 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:40,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 87 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:42:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-02-15 03:42:41,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1003. [2022-02-15 03:42:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 940 states have (on average 1.1808510638297873) internal successors, (1110), 968 states have internal predecessors, (1110), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-15 03:42:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1194 transitions. [2022-02-15 03:42:41,926 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1194 transitions. Word has length 66 [2022-02-15 03:42:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:41,927 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1194 transitions. [2022-02-15 03:42:41,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:41,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1194 transitions. [2022-02-15 03:42:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:42:41,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:41,928 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:42:41,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 03:42:41,929 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:41,929 INFO L85 PathProgramCache]: Analyzing trace with hash -140337438, now seen corresponding path program 26 times [2022-02-15 03:42:41,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:41,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918485122] [2022-02-15 03:42:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:41,930 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:41,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:41,931 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:42,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:42,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:42,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918485122] [2022-02-15 03:42:42,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918485122] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:42,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:42,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 03:42:42,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984474735] [2022-02-15 03:42:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:42,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 03:42:42,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 03:42:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 03:42:42,692 INFO L87 Difference]: Start difference. First operand 1003 states and 1194 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 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) [2022-02-15 03:42:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:46,744 INFO L93 Difference]: Finished difference Result 1110 states and 1322 transitions. [2022-02-15 03:42:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 03:42:46,745 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 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 [2022-02-15 03:42:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:46,748 INFO L225 Difference]: With dead ends: 1110 [2022-02-15 03:42:46,748 INFO L226 Difference]: Without dead ends: 1108 [2022-02-15 03:42:46,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=741, Invalid=4809, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 03:42:46,749 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 245 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:46,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 111 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:42:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-02-15 03:42:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1009. [2022-02-15 03:42:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 946 states have (on average 1.1818181818181819) internal successors, (1118), 974 states have internal predecessors, (1118), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-15 03:42:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1202 transitions. [2022-02-15 03:42:48,607 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1202 transitions. Word has length 66 [2022-02-15 03:42:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:48,607 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1202 transitions. [2022-02-15 03:42:48,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 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) [2022-02-15 03:42:48,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1202 transitions. [2022-02-15 03:42:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:42:48,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:48,609 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:42:48,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 03:42:48,609 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:48,609 INFO L85 PathProgramCache]: Analyzing trace with hash -337327382, now seen corresponding path program 19 times [2022-02-15 03:42:48,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:48,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190230110] [2022-02-15 03:42:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:48,610 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:48,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:48,612 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:49,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:49,218 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:49,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190230110] [2022-02-15 03:42:49,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [190230110] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:49,218 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:49,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:42:49,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397151346] [2022-02-15 03:42:49,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:49,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:42:49,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:42:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:42:49,219 INFO L87 Difference]: Start difference. First operand 1009 states and 1202 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:52,664 INFO L93 Difference]: Finished difference Result 1149 states and 1371 transitions. [2022-02-15 03:42:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 03:42:52,665 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 03:42:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:52,667 INFO L225 Difference]: With dead ends: 1149 [2022-02-15 03:42:52,668 INFO L226 Difference]: Without dead ends: 1147 [2022-02-15 03:42:52,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=543, Invalid=2879, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 03:42:52,668 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 158 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:52,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 55 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:42:52,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-02-15 03:42:54,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1034. [2022-02-15 03:42:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 968 states have (on average 1.1828512396694215) internal successors, (1145), 998 states have internal predecessors, (1145), 45 states have call successors, (45), 21 states have call predecessors, (45), 20 states have return successors, (43), 14 states have call predecessors, (43), 43 states have call successors, (43) [2022-02-15 03:42:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1233 transitions. [2022-02-15 03:42:54,391 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1233 transitions. Word has length 66 [2022-02-15 03:42:54,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:54,391 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 1233 transitions. [2022-02-15 03:42:54,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:54,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1233 transitions. [2022-02-15 03:42:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:42:54,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:54,393 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:42:54,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 03:42:54,393 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:54,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1584291114, now seen corresponding path program 20 times [2022-02-15 03:42:54,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:54,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298066720] [2022-02-15 03:42:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:54,394 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:54,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:54,396 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:55,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:55,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:55,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298066720] [2022-02-15 03:42:55,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [298066720] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:55,052 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:55,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 03:42:55,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390862525] [2022-02-15 03:42:55,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:55,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 03:42:55,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:55,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 03:42:55,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:42:55,053 INFO L87 Difference]: Start difference. First operand 1034 states and 1233 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:58,478 INFO L93 Difference]: Finished difference Result 1155 states and 1377 transitions. [2022-02-15 03:42:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 03:42:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 03:42:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:58,481 INFO L225 Difference]: With dead ends: 1155 [2022-02-15 03:42:58,481 INFO L226 Difference]: Without dead ends: 1153 [2022-02-15 03:42:58,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=514, Invalid=3646, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 03:42:58,481 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 228 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:58,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 62 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:42:58,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-02-15 03:43:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1031. [2022-02-15 03:43:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 965 states have (on average 1.1823834196891192) internal successors, (1141), 995 states have internal predecessors, (1141), 45 states have call successors, (45), 21 states have call predecessors, (45), 20 states have return successors, (43), 14 states have call predecessors, (43), 43 states have call successors, (43) [2022-02-15 03:43:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1229 transitions. [2022-02-15 03:43:00,543 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1229 transitions. Word has length 66 [2022-02-15 03:43:00,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:00,543 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 1229 transitions. [2022-02-15 03:43:00,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1229 transitions. [2022-02-15 03:43:00,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:43:00,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:00,545 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:43:00,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 03:43:00,545 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:00,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1237330082, now seen corresponding path program 21 times [2022-02-15 03:43:00,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:00,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012874262] [2022-02-15 03:43:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:00,547 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:00,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:00,549 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:01,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:43:01,213 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:01,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012874262] [2022-02-15 03:43:01,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012874262] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:01,214 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:01,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 03:43:01,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402595611] [2022-02-15 03:43:01,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:01,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 03:43:01,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:01,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 03:43:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:43:01,215 INFO L87 Difference]: Start difference. First operand 1031 states and 1229 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:04,904 INFO L93 Difference]: Finished difference Result 1170 states and 1390 transitions. [2022-02-15 03:43:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 03:43:04,904 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 03:43:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:04,907 INFO L225 Difference]: With dead ends: 1170 [2022-02-15 03:43:04,907 INFO L226 Difference]: Without dead ends: 1168 [2022-02-15 03:43:04,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=2667, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 03:43:04,908 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 143 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:04,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 86 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:43:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2022-02-15 03:43:06,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1016. [2022-02-15 03:43:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 952 states have (on average 1.1827731092436975) internal successors, (1126), 980 states have internal predecessors, (1126), 43 states have call successors, (43), 21 states have call predecessors, (43), 20 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-15 03:43:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1210 transitions. [2022-02-15 03:43:06,778 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1210 transitions. Word has length 66 [2022-02-15 03:43:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:06,778 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 1210 transitions. [2022-02-15 03:43:06,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1210 transitions. [2022-02-15 03:43:06,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:43:06,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:06,780 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:43:06,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 03:43:06,780 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:06,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:06,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1870934436, now seen corresponding path program 22 times [2022-02-15 03:43:06,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:06,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756926575] [2022-02-15 03:43:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:06,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:06,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:06,784 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:07,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:43:07,454 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:07,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756926575] [2022-02-15 03:43:07,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1756926575] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:07,454 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:07,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 03:43:07,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391280760] [2022-02-15 03:43:07,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:07,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 03:43:07,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 03:43:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:43:07,455 INFO L87 Difference]: Start difference. First operand 1016 states and 1210 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:10,617 INFO L93 Difference]: Finished difference Result 1187 states and 1415 transitions. [2022-02-15 03:43:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 03:43:10,618 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 03:43:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:10,620 INFO L225 Difference]: With dead ends: 1187 [2022-02-15 03:43:10,620 INFO L226 Difference]: Without dead ends: 1185 [2022-02-15 03:43:10,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=422, Invalid=2658, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 03:43:10,621 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:10,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 55 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:43:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-02-15 03:43:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1022. [2022-02-15 03:43:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 958 states have (on average 1.1837160751565763) internal successors, (1134), 986 states have internal predecessors, (1134), 43 states have call successors, (43), 21 states have call predecessors, (43), 20 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-15 03:43:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1218 transitions. [2022-02-15 03:43:12,202 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1218 transitions. Word has length 66 [2022-02-15 03:43:12,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:12,203 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 1218 transitions. [2022-02-15 03:43:12,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1218 transitions. [2022-02-15 03:43:12,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:43:12,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:12,204 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:43:12,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 03:43:12,205 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash 667727747, now seen corresponding path program 15 times [2022-02-15 03:43:12,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:12,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373634078] [2022-02-15 03:43:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:12,206 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:12,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:12,209 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:12,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:12,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 03:43:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:12,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 03:43:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:43:12,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:12,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373634078] [2022-02-15 03:43:12,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373634078] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:12,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:12,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:43:12,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849611090] [2022-02-15 03:43:12,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:12,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:43:12,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:12,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:43:12,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:43:12,947 INFO L87 Difference]: Start difference. First operand 1022 states and 1218 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:43:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:16,762 INFO L93 Difference]: Finished difference Result 1077 states and 1281 transitions. [2022-02-15 03:43:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 03:43:16,773 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2022-02-15 03:43:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:16,788 INFO L225 Difference]: With dead ends: 1077 [2022-02-15 03:43:16,788 INFO L226 Difference]: Without dead ends: 1042 [2022-02-15 03:43:16,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=637, Invalid=4619, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 03:43:16,789 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 172 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:16,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 107 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:43:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-02-15 03:43:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 963. [2022-02-15 03:43:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 905 states have (on average 1.188950276243094) internal successors, (1076), 930 states have internal predecessors, (1076), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 13 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-15 03:43:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1152 transitions. [2022-02-15 03:43:18,678 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1152 transitions. Word has length 69 [2022-02-15 03:43:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:18,678 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1152 transitions. [2022-02-15 03:43:18,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:43:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1152 transitions. [2022-02-15 03:43:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:43:18,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:18,679 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:43:18,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-15 03:43:18,680 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1360968119, now seen corresponding path program 16 times [2022-02-15 03:43:18,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:18,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808886266] [2022-02-15 03:43:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:18,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:18,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:18,683 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:19,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:19,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 03:43:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:19,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 03:43:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:43:19,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:19,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808886266] [2022-02-15 03:43:19,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [808886266] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:19,632 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:19,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 03:43:19,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477267088] [2022-02-15 03:43:19,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:19,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 03:43:19,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:19,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 03:43:19,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 03:43:19,633 INFO L87 Difference]: Start difference. First operand 963 states and 1152 transitions. Second operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:43:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:24,388 INFO L93 Difference]: Finished difference Result 1086 states and 1289 transitions. [2022-02-15 03:43:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 03:43:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2022-02-15 03:43:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:24,391 INFO L225 Difference]: With dead ends: 1086 [2022-02-15 03:43:24,391 INFO L226 Difference]: Without dead ends: 1039 [2022-02-15 03:43:24,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1041, Invalid=7149, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 03:43:24,392 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 239 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:24,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 98 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:43:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-02-15 03:43:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 969. [2022-02-15 03:43:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 911 states have (on average 1.1888035126234906) internal successors, (1083), 936 states have internal predecessors, (1083), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 13 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-15 03:43:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1159 transitions. [2022-02-15 03:43:26,400 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1159 transitions. Word has length 69 [2022-02-15 03:43:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:26,401 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1159 transitions. [2022-02-15 03:43:26,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:43:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1159 transitions. [2022-02-15 03:43:26,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:43:26,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:26,403 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:43:26,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-15 03:43:26,403 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:26,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:26,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1404533430, now seen corresponding path program 17 times [2022-02-15 03:43:26,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:26,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704294257] [2022-02-15 03:43:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:26,405 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:26,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:26,407 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:26,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:26,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 03:43:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:43:26,977 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:26,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704294257] [2022-02-15 03:43:26,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [704294257] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:26,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:26,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:43:26,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115129182] [2022-02-15 03:43:26,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:26,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:43:26,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:43:26,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:43:26,978 INFO L87 Difference]: Start difference. First operand 969 states and 1159 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:43:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:31,479 INFO L93 Difference]: Finished difference Result 1184 states and 1424 transitions. [2022-02-15 03:43:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 03:43:31,480 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-02-15 03:43:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:31,495 INFO L225 Difference]: With dead ends: 1184 [2022-02-15 03:43:31,495 INFO L226 Difference]: Without dead ends: 1182 [2022-02-15 03:43:31,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 03:43:31,496 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 279 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:31,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 148 Invalid, 2657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 03:43:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-02-15 03:43:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1001. [2022-02-15 03:43:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 940 states have (on average 1.1904255319148935) internal successors, (1119), 966 states have internal predecessors, (1119), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (39), 14 states have call predecessors, (39), 39 states have call successors, (39) [2022-02-15 03:43:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1199 transitions. [2022-02-15 03:43:33,683 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1199 transitions. Word has length 68 [2022-02-15 03:43:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:33,683 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 1199 transitions. [2022-02-15 03:43:33,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:43:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1199 transitions. [2022-02-15 03:43:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:43:33,685 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:33,685 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:43:33,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-15 03:43:33,685 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:33,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:33,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2068396432, now seen corresponding path program 18 times [2022-02-15 03:43:33,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:33,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097312902] [2022-02-15 03:43:33,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:33,687 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:33,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:33,690 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:34,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:34,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 03:43:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:43:34,284 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:34,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097312902] [2022-02-15 03:43:34,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097312902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:34,284 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:34,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:43:34,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115521697] [2022-02-15 03:43:34,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:34,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:43:34,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:34,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:43:34,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:43:34,285 INFO L87 Difference]: Start difference. First operand 1001 states and 1199 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:43:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:39,069 INFO L93 Difference]: Finished difference Result 1372 states and 1661 transitions. [2022-02-15 03:43:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 03:43:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-02-15 03:43:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:39,072 INFO L225 Difference]: With dead ends: 1372 [2022-02-15 03:43:39,072 INFO L226 Difference]: Without dead ends: 1370 [2022-02-15 03:43:39,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=5193, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 03:43:39,072 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 371 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:39,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 122 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:43:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2022-02-15 03:43:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1057. [2022-02-15 03:43:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 992 states have (on average 1.1925403225806452) internal successors, (1183), 1020 states have internal predecessors, (1183), 44 states have call successors, (44), 21 states have call predecessors, (44), 20 states have return successors, (42), 15 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-15 03:43:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1269 transitions. [2022-02-15 03:43:41,382 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1269 transitions. Word has length 68 [2022-02-15 03:43:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:41,382 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1269 transitions. [2022-02-15 03:43:41,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:43:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1269 transitions. [2022-02-15 03:43:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:43:41,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:41,386 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:43:41,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-15 03:43:41,386 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:41,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1659314518, now seen corresponding path program 19 times [2022-02-15 03:43:41,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:41,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068952577] [2022-02-15 03:43:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:41,388 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:41,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:41,402 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:41,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:41,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 03:43:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:43:41,916 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:41,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068952577] [2022-02-15 03:43:41,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2068952577] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:41,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:41,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:43:41,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520977633] [2022-02-15 03:43:41,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:41,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:43:41,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:43:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:43:41,917 INFO L87 Difference]: Start difference. First operand 1057 states and 1269 transitions. Second operand has 26 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:43:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:46,137 INFO L93 Difference]: Finished difference Result 1277 states and 1538 transitions. [2022-02-15 03:43:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 03:43:46,137 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-02-15 03:43:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:46,139 INFO L225 Difference]: With dead ends: 1277 [2022-02-15 03:43:46,139 INFO L226 Difference]: Without dead ends: 1275 [2022-02-15 03:43:46,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=3105, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 03:43:46,140 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 251 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:46,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 96 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:43:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-02-15 03:43:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1081. [2022-02-15 03:43:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1014 states have (on average 1.193293885601578) internal successors, (1210), 1044 states have internal predecessors, (1210), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (44), 15 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-15 03:43:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1300 transitions. [2022-02-15 03:43:48,607 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1300 transitions. Word has length 68 [2022-02-15 03:43:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:48,608 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1300 transitions. [2022-02-15 03:43:48,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:43:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1300 transitions. [2022-02-15 03:43:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:43:48,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:48,610 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:43:48,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-15 03:43:48,610 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1755632320, now seen corresponding path program 17 times [2022-02-15 03:43:48,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:48,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408394508] [2022-02-15 03:43:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:48,611 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:48,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:48,614 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:49,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:49,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 03:43:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:43:49,654 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:49,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408394508] [2022-02-15 03:43:49,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1408394508] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:49,654 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:49,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 03:43:49,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699925855] [2022-02-15 03:43:49,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:49,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 03:43:49,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:49,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 03:43:49,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 03:43:49,655 INFO L87 Difference]: Start difference. First operand 1081 states and 1300 transitions. Second operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:43:58,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:58,215 INFO L93 Difference]: Finished difference Result 1348 states and 1619 transitions. [2022-02-15 03:43:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-15 03:43:58,216 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 03:43:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:58,218 INFO L225 Difference]: With dead ends: 1348 [2022-02-15 03:43:58,218 INFO L226 Difference]: Without dead ends: 1346 [2022-02-15 03:43:58,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5330 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1891, Invalid=13609, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 03:43:58,220 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 371 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3201 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 3624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:58,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 129 Invalid, 3624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3201 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 03:43:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-02-15 03:44:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1102. [2022-02-15 03:44:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1035 states have (on average 1.1942028985507247) internal successors, (1236), 1065 states have internal predecessors, (1236), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (44), 15 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-15 03:44:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1326 transitions. [2022-02-15 03:44:00,169 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1326 transitions. Word has length 69 [2022-02-15 03:44:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:00,170 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1326 transitions. [2022-02-15 03:44:00,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:44:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1326 transitions. [2022-02-15 03:44:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:44:00,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:00,171 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:44:00,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-15 03:44:00,171 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1758967990, now seen corresponding path program 18 times [2022-02-15 03:44:00,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:00,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955701079] [2022-02-15 03:44:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:00,175 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:00,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:00,177 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:01,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:01,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 03:44:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:01,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:01,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955701079] [2022-02-15 03:44:01,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [955701079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:01,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:01,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 03:44:01,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888114639] [2022-02-15 03:44:01,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:01,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 03:44:01,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:01,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 03:44:01,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 03:44:01,096 INFO L87 Difference]: Start difference. First operand 1102 states and 1326 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:44:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:06,232 INFO L93 Difference]: Finished difference Result 1310 states and 1579 transitions. [2022-02-15 03:44:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 03:44:06,232 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 03:44:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:06,234 INFO L225 Difference]: With dead ends: 1310 [2022-02-15 03:44:06,235 INFO L226 Difference]: Without dead ends: 1308 [2022-02-15 03:44:06,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=691, Invalid=4711, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 03:44:06,235 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 205 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:06,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 92 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:44:06,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-02-15 03:44:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1129. [2022-02-15 03:44:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1060 states have (on average 1.1952830188679244) internal successors, (1267), 1092 states have internal predecessors, (1267), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (46), 15 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 03:44:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1361 transitions. [2022-02-15 03:44:08,520 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1361 transitions. Word has length 69 [2022-02-15 03:44:08,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:08,520 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 1361 transitions. [2022-02-15 03:44:08,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:44:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1361 transitions. [2022-02-15 03:44:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:44:08,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:08,521 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:44:08,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-15 03:44:08,522 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:08,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:08,522 INFO L85 PathProgramCache]: Analyzing trace with hash -310743238, now seen corresponding path program 19 times [2022-02-15 03:44:08,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:08,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432724301] [2022-02-15 03:44:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:08,523 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:08,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:08,525 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:09,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:09,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 03:44:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:09,646 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:09,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432724301] [2022-02-15 03:44:09,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432724301] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:09,646 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:09,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 03:44:09,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127471967] [2022-02-15 03:44:09,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:09,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 03:44:09,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:09,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 03:44:09,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:44:09,648 INFO L87 Difference]: Start difference. First operand 1129 states and 1361 transitions. Second operand has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:44:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:15,220 INFO L93 Difference]: Finished difference Result 1250 states and 1504 transitions. [2022-02-15 03:44:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 03:44:15,221 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 03:44:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:15,223 INFO L225 Difference]: With dead ends: 1250 [2022-02-15 03:44:15,223 INFO L226 Difference]: Without dead ends: 1248 [2022-02-15 03:44:15,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2444 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=937, Invalid=7435, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 03:44:15,224 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 255 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:15,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 119 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:44:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-02-15 03:44:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1156. [2022-02-15 03:44:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1087 states have (on average 1.1950321987120516) internal successors, (1299), 1119 states have internal predecessors, (1299), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (46), 15 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 03:44:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1393 transitions. [2022-02-15 03:44:17,910 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1393 transitions. Word has length 69 [2022-02-15 03:44:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:17,910 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1393 transitions. [2022-02-15 03:44:17,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:44:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1393 transitions. [2022-02-15 03:44:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:44:17,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:17,913 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:44:17,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-15 03:44:17,913 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:17,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1053663758, now seen corresponding path program 20 times [2022-02-15 03:44:17,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:17,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087319151] [2022-02-15 03:44:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:17,915 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:17,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:17,916 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:18,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:18,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 03:44:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:18,440 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:18,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087319151] [2022-02-15 03:44:18,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087319151] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:18,440 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:18,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 03:44:18,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880322797] [2022-02-15 03:44:18,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:18,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 03:44:18,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 03:44:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:44:18,441 INFO L87 Difference]: Start difference. First operand 1156 states and 1393 transitions. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:44:22,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:22,912 INFO L93 Difference]: Finished difference Result 1291 states and 1553 transitions. [2022-02-15 03:44:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 03:44:22,912 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 03:44:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:22,914 INFO L225 Difference]: With dead ends: 1291 [2022-02-15 03:44:22,914 INFO L226 Difference]: Without dead ends: 1289 [2022-02-15 03:44:22,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=463, Invalid=4793, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 03:44:22,915 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 187 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:22,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 136 Invalid, 2738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:44:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-02-15 03:44:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1156. [2022-02-15 03:44:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1087 states have (on average 1.1950321987120516) internal successors, (1299), 1119 states have internal predecessors, (1299), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (46), 15 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 03:44:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1393 transitions. [2022-02-15 03:44:25,548 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1393 transitions. Word has length 69 [2022-02-15 03:44:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:25,548 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1393 transitions. [2022-02-15 03:44:25,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:44:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1393 transitions. [2022-02-15 03:44:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:44:25,550 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:25,550 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:44:25,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-15 03:44:25,550 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:25,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:25,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1944728152, now seen corresponding path program 21 times [2022-02-15 03:44:25,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:25,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639824397] [2022-02-15 03:44:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:25,556 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:25,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:25,558 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:26,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:26,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 03:44:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:26,419 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:26,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639824397] [2022-02-15 03:44:26,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639824397] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:26,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:26,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 03:44:26,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726587587] [2022-02-15 03:44:26,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:26,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 03:44:26,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:26,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 03:44:26,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 03:44:26,420 INFO L87 Difference]: Start difference. First operand 1156 states and 1393 transitions. Second operand has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:44:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:31,518 INFO L93 Difference]: Finished difference Result 1280 states and 1542 transitions. [2022-02-15 03:44:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 03:44:31,519 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 03:44:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:31,520 INFO L225 Difference]: With dead ends: 1280 [2022-02-15 03:44:31,520 INFO L226 Difference]: Without dead ends: 1278 [2022-02-15 03:44:31,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=808, Invalid=5998, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 03:44:31,521 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 218 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:31,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 129 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:44:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-02-15 03:44:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1162. [2022-02-15 03:44:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1094 states have (on average 1.1974405850091407) internal successors, (1310), 1125 states have internal predecessors, (1310), 47 states have call successors, (47), 21 states have call predecessors, (47), 20 states have return successors, (45), 15 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-15 03:44:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1402 transitions. [2022-02-15 03:44:34,055 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1402 transitions. Word has length 69 [2022-02-15 03:44:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:34,055 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1402 transitions. [2022-02-15 03:44:34,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:44:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1402 transitions. [2022-02-15 03:44:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:44:34,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:34,056 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:44:34,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-15 03:44:34,057 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:34,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1004222264, now seen corresponding path program 20 times [2022-02-15 03:44:34,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:34,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649910264] [2022-02-15 03:44:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:34,058 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:34,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:34,060 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:34,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:34,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 03:44:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:34,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 03:44:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:34,392 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:34,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649910264] [2022-02-15 03:44:34,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [649910264] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:34,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:34,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 03:44:34,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252830179] [2022-02-15 03:44:34,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:34,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 03:44:34,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 03:44:34,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:44:34,393 INFO L87 Difference]: Start difference. First operand 1162 states and 1402 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:44:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:38,888 INFO L93 Difference]: Finished difference Result 1288 states and 1552 transitions. [2022-02-15 03:44:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 03:44:38,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-02-15 03:44:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:38,890 INFO L225 Difference]: With dead ends: 1288 [2022-02-15 03:44:38,890 INFO L226 Difference]: Without dead ends: 1286 [2022-02-15 03:44:38,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=431, Invalid=3351, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 03:44:38,891 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 253 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:38,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 82 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:44:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2022-02-15 03:44:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1197. [2022-02-15 03:44:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1123 states have (on average 1.1932324131789849) internal successors, (1340), 1158 states have internal predecessors, (1340), 53 states have call successors, (53), 21 states have call predecessors, (53), 20 states have return successors, (51), 17 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-15 03:44:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1444 transitions. [2022-02-15 03:44:41,277 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1444 transitions. Word has length 71 [2022-02-15 03:44:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:41,277 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1444 transitions. [2022-02-15 03:44:41,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:44:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1444 transitions. [2022-02-15 03:44:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:44:41,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:41,279 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:44:41,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-15 03:44:41,279 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:41,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2022160008, now seen corresponding path program 21 times [2022-02-15 03:44:41,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:41,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194866162] [2022-02-15 03:44:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:41,280 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:41,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:41,282 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:41,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:41,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 03:44:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 03:44:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:41,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:41,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194866162] [2022-02-15 03:44:41,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [194866162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:41,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:41,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:44:41,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698927883] [2022-02-15 03:44:41,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:41,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:44:41,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:41,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:44:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:44:41,902 INFO L87 Difference]: Start difference. First operand 1197 states and 1444 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:44:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:46,476 INFO L93 Difference]: Finished difference Result 1303 states and 1570 transitions. [2022-02-15 03:44:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 03:44:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-02-15 03:44:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:46,479 INFO L225 Difference]: With dead ends: 1303 [2022-02-15 03:44:46,479 INFO L226 Difference]: Without dead ends: 1301 [2022-02-15 03:44:46,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=534, Invalid=4158, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 03:44:46,480 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 232 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:46,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 109 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:44:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2022-02-15 03:44:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1267. [2022-02-15 03:44:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1187 states have (on average 1.18955349620893) internal successors, (1412), 1224 states have internal predecessors, (1412), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-15 03:44:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1526 transitions. [2022-02-15 03:44:49,103 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1526 transitions. Word has length 71 [2022-02-15 03:44:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:49,103 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 1526 transitions. [2022-02-15 03:44:49,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:44:49,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1526 transitions. [2022-02-15 03:44:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:44:49,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:49,105 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:44:49,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-15 03:44:49,105 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:49,105 INFO L85 PathProgramCache]: Analyzing trace with hash 353640872, now seen corresponding path program 27 times [2022-02-15 03:44:49,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:49,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851086330] [2022-02-15 03:44:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:49,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:49,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:49,108 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:49,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:49,324 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:49,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851086330] [2022-02-15 03:44:49,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1851086330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:49,324 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:49,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:44:49,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922926785] [2022-02-15 03:44:49,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:49,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:44:49,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:49,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:44:49,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:44:49,325 INFO L87 Difference]: Start difference. First operand 1267 states and 1526 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:44:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:55,674 INFO L93 Difference]: Finished difference Result 2489 states and 3075 transitions. [2022-02-15 03:44:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 03:44:55,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:44:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:55,678 INFO L225 Difference]: With dead ends: 2489 [2022-02-15 03:44:55,678 INFO L226 Difference]: Without dead ends: 2189 [2022-02-15 03:44:55,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=1278, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 03:44:55,679 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 841 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:55,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 119 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:44:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-02-15 03:44:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1781. [2022-02-15 03:44:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1701 states have (on average 1.207524985302763) internal successors, (2054), 1738 states have internal predecessors, (2054), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-15 03:44:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2168 transitions. [2022-02-15 03:44:58,784 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2168 transitions. Word has length 69 [2022-02-15 03:44:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:58,785 INFO L470 AbstractCegarLoop]: Abstraction has 1781 states and 2168 transitions. [2022-02-15 03:44:58,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:44:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2168 transitions. [2022-02-15 03:44:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:44:58,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:58,787 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:44:58,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-15 03:44:58,787 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:58,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1795844299, now seen corresponding path program 28 times [2022-02-15 03:44:58,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:58,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078350607] [2022-02-15 03:44:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:58,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:58,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:58,790 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:59,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:59,130 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:59,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078350607] [2022-02-15 03:44:59,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078350607] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:59,130 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:59,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:44:59,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736742393] [2022-02-15 03:44:59,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:59,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:44:59,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:59,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:44:59,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:44:59,131 INFO L87 Difference]: Start difference. First operand 1781 states and 2168 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:45:06,678 INFO L93 Difference]: Finished difference Result 2244 states and 2750 transitions. [2022-02-15 03:45:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 03:45:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:45:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:45:06,682 INFO L225 Difference]: With dead ends: 2244 [2022-02-15 03:45:06,682 INFO L226 Difference]: Without dead ends: 2242 [2022-02-15 03:45:06,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3349 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2299, Invalid=7013, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 03:45:06,683 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 347 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:45:06,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 62 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:45:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-02-15 03:45:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1873. [2022-02-15 03:45:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1793 states have (on average 1.2141662018962633) internal successors, (2177), 1830 states have internal predecessors, (2177), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-15 03:45:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2291 transitions. [2022-02-15 03:45:10,823 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2291 transitions. Word has length 69 [2022-02-15 03:45:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:45:10,823 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 2291 transitions. [2022-02-15 03:45:10,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2291 transitions. [2022-02-15 03:45:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:45:10,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:45:10,825 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:45:10,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-15 03:45:10,826 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:45:10,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:45:10,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1094779721, now seen corresponding path program 23 times [2022-02-15 03:45:10,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:45:10,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749908309] [2022-02-15 03:45:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:45:10,828 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:45:10,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:45:10,830 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:45:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:45:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:45:10,917 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:45:10,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749908309] [2022-02-15 03:45:10,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749908309] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:45:10,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:45:10,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:45:10,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262735728] [2022-02-15 03:45:10,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:45:10,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:45:10,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:45:10,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:45:10,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:45:10,919 INFO L87 Difference]: Start difference. First operand 1873 states and 2291 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:45:16,730 INFO L93 Difference]: Finished difference Result 2122 states and 2598 transitions. [2022-02-15 03:45:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 03:45:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:45:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:45:16,733 INFO L225 Difference]: With dead ends: 2122 [2022-02-15 03:45:16,733 INFO L226 Difference]: Without dead ends: 2089 [2022-02-15 03:45:16,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=655, Invalid=1697, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 03:45:16,734 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 183 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:45:16,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 72 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:45:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2022-02-15 03:45:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1880. [2022-02-15 03:45:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1800 states have (on average 1.2138888888888888) internal successors, (2185), 1837 states have internal predecessors, (2185), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-15 03:45:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 2299 transitions. [2022-02-15 03:45:20,097 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 2299 transitions. Word has length 69 [2022-02-15 03:45:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:45:20,097 INFO L470 AbstractCegarLoop]: Abstraction has 1880 states and 2299 transitions. [2022-02-15 03:45:20,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 2299 transitions. [2022-02-15 03:45:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:45:20,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:45:20,099 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:45:20,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-15 03:45:20,099 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:45:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:45:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2103292271, now seen corresponding path program 29 times [2022-02-15 03:45:20,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:45:20,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411827552] [2022-02-15 03:45:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:45:20,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:45:20,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:45:20,102 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:45:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:20,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:45:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:45:20,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:45:20,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411827552] [2022-02-15 03:45:20,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [411827552] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:45:20,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:45:20,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:45:20,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141154847] [2022-02-15 03:45:20,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:45:20,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:45:20,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:45:20,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:45:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:45:20,701 INFO L87 Difference]: Start difference. First operand 1880 states and 2299 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:45:27,678 INFO L93 Difference]: Finished difference Result 2084 states and 2537 transitions. [2022-02-15 03:45:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 03:45:27,679 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:45:27,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:45:27,682 INFO L225 Difference]: With dead ends: 2084 [2022-02-15 03:45:27,682 INFO L226 Difference]: Without dead ends: 2082 [2022-02-15 03:45:27,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=796, Invalid=5524, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 03:45:27,683 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 338 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:45:27,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 97 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:45:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-02-15 03:45:31,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1901. [2022-02-15 03:45:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1821 states have (on average 1.215266337177375) internal successors, (2213), 1858 states have internal predecessors, (2213), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-15 03:45:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2327 transitions. [2022-02-15 03:45:31,600 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2327 transitions. Word has length 69 [2022-02-15 03:45:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:45:31,600 INFO L470 AbstractCegarLoop]: Abstraction has 1901 states and 2327 transitions. [2022-02-15 03:45:31,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2327 transitions. [2022-02-15 03:45:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:45:31,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:45:31,602 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:45:31,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-15 03:45:31,602 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:45:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:45:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash -671758409, now seen corresponding path program 24 times [2022-02-15 03:45:31,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:45:31,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892539044] [2022-02-15 03:45:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:45:31,604 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:45:31,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:45:31,606 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:45:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:32,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:45:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:45:32,356 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:45:32,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892539044] [2022-02-15 03:45:32,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892539044] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:45:32,356 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:45:32,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:45:32,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209877431] [2022-02-15 03:45:32,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:45:32,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:45:32,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:45:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:45:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:45:32,357 INFO L87 Difference]: Start difference. First operand 1901 states and 2327 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:45:39,988 INFO L93 Difference]: Finished difference Result 2186 states and 2675 transitions. [2022-02-15 03:45:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 03:45:39,992 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:45:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:45:39,995 INFO L225 Difference]: With dead ends: 2186 [2022-02-15 03:45:39,996 INFO L226 Difference]: Without dead ends: 2184 [2022-02-15 03:45:39,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=747, Invalid=6393, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 03:45:39,997 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 389 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:45:39,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 82 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 2672 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 03:45:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2022-02-15 03:45:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1913. [2022-02-15 03:45:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1833 states have (on average 1.2160392798690671) internal successors, (2229), 1870 states have internal predecessors, (2229), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-15 03:45:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2343 transitions. [2022-02-15 03:45:43,632 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2343 transitions. Word has length 69 [2022-02-15 03:45:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:45:43,632 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 2343 transitions. [2022-02-15 03:45:43,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2343 transitions. [2022-02-15 03:45:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:45:43,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:45:43,634 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:45:43,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-15 03:45:43,634 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:45:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:45:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash 194554805, now seen corresponding path program 30 times [2022-02-15 03:45:43,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:45:43,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404894904] [2022-02-15 03:45:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:45:43,636 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:45:43,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:45:43,637 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:45:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:44,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:45:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:45:44,344 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:45:44,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404894904] [2022-02-15 03:45:44,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [404894904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:45:44,345 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:45:44,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:45:44,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931477426] [2022-02-15 03:45:44,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:45:44,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:45:44,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:45:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:45:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:45:44,346 INFO L87 Difference]: Start difference. First operand 1913 states and 2343 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:52,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:45:52,600 INFO L93 Difference]: Finished difference Result 2346 states and 2861 transitions. [2022-02-15 03:45:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 03:45:52,601 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:45:52,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:45:52,603 INFO L225 Difference]: With dead ends: 2346 [2022-02-15 03:45:52,603 INFO L226 Difference]: Without dead ends: 2291 [2022-02-15 03:45:52,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=955, Invalid=8165, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 03:45:52,604 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 364 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3617 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 3617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:45:52,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 133 Invalid, 3850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 3617 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 03:45:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-02-15 03:45:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1978. [2022-02-15 03:45:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1896 states have (on average 1.2183544303797469) internal successors, (2310), 1934 states have internal predecessors, (2310), 59 states have call successors, (59), 23 states have call predecessors, (59), 22 states have return successors, (57), 20 states have call predecessors, (57), 57 states have call successors, (57) [2022-02-15 03:45:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2426 transitions. [2022-02-15 03:45:56,850 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2426 transitions. Word has length 69 [2022-02-15 03:45:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:45:56,850 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2426 transitions. [2022-02-15 03:45:56,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2426 transitions. [2022-02-15 03:45:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:45:56,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:45:56,856 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:45:56,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-15 03:45:56,856 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:45:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:45:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash -643408281, now seen corresponding path program 25 times [2022-02-15 03:45:56,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:45:56,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987597386] [2022-02-15 03:45:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:45:56,858 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:45:56,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:45:56,860 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:45:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:57,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:45:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:45:57,647 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:45:57,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987597386] [2022-02-15 03:45:57,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [987597386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:45:57,648 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:45:57,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:45:57,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658562791] [2022-02-15 03:45:57,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:45:57,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:45:57,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:45:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:45:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:45:57,649 INFO L87 Difference]: Start difference. First operand 1978 states and 2426 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:46:04,361 INFO L93 Difference]: Finished difference Result 2133 states and 2612 transitions. [2022-02-15 03:46:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 03:46:04,362 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:46:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:46:04,387 INFO L225 Difference]: With dead ends: 2133 [2022-02-15 03:46:04,387 INFO L226 Difference]: Without dead ends: 2131 [2022-02-15 03:46:04,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=685, Invalid=4007, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 03:46:04,388 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 260 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:46:04,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 96 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:46:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2022-02-15 03:46:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 2042. [2022-02-15 03:46:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 1955 states have (on average 1.2189258312020461) internal successors, (2383), 1996 states have internal predecessors, (2383), 62 states have call successors, (62), 25 states have call predecessors, (62), 24 states have return successors, (60), 20 states have call predecessors, (60), 60 states have call successors, (60) [2022-02-15 03:46:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 2505 transitions. [2022-02-15 03:46:07,978 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 2505 transitions. Word has length 69 [2022-02-15 03:46:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:46:07,978 INFO L470 AbstractCegarLoop]: Abstraction has 2042 states and 2505 transitions. [2022-02-15 03:46:07,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 2505 transitions. [2022-02-15 03:46:07,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:46:07,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:46:07,981 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:46:07,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-15 03:46:07,981 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:46:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:46:07,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1830111059, now seen corresponding path program 26 times [2022-02-15 03:46:07,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:46:07,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315560548] [2022-02-15 03:46:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:46:07,982 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:46:07,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:46:07,984 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:46:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:08,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:46:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:46:08,564 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:46:08,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315560548] [2022-02-15 03:46:08,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [315560548] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:46:08,565 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:46:08,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 03:46:08,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370866945] [2022-02-15 03:46:08,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:46:08,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 03:46:08,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:46:08,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 03:46:08,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:46:08,566 INFO L87 Difference]: Start difference. First operand 2042 states and 2505 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:46:14,663 INFO L93 Difference]: Finished difference Result 2194 states and 2685 transitions. [2022-02-15 03:46:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 03:46:14,664 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:46:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:46:14,666 INFO L225 Difference]: With dead ends: 2194 [2022-02-15 03:46:14,667 INFO L226 Difference]: Without dead ends: 2192 [2022-02-15 03:46:14,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=737, Invalid=4093, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 03:46:14,667 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 252 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:46:14,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 105 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:46:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2022-02-15 03:46:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2031. [2022-02-15 03:46:18,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1944 states have (on average 1.2186213991769548) internal successors, (2369), 1984 states have internal predecessors, (2369), 61 states have call successors, (61), 26 states have call predecessors, (61), 25 states have return successors, (59), 20 states have call predecessors, (59), 59 states have call successors, (59) [2022-02-15 03:46:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2489 transitions. [2022-02-15 03:46:18,424 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2489 transitions. Word has length 69 [2022-02-15 03:46:18,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:46:18,424 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 2489 transitions. [2022-02-15 03:46:18,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:18,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2489 transitions. [2022-02-15 03:46:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:46:18,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:46:18,426 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:46:18,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-15 03:46:18,426 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:46:18,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:46:18,426 INFO L85 PathProgramCache]: Analyzing trace with hash -141333981, now seen corresponding path program 31 times [2022-02-15 03:46:18,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:46:18,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561090225] [2022-02-15 03:46:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:46:18,427 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:46:18,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:46:18,429 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:46:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:19,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:46:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:46:19,164 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:46:19,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561090225] [2022-02-15 03:46:19,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [561090225] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:46:19,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:46:19,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:46:19,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930828423] [2022-02-15 03:46:19,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:46:19,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:46:19,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:46:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:46:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:46:19,165 INFO L87 Difference]: Start difference. First operand 2031 states and 2489 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:27,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:46:27,323 INFO L93 Difference]: Finished difference Result 2387 states and 2920 transitions. [2022-02-15 03:46:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 03:46:27,323 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:46:27,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:46:27,326 INFO L225 Difference]: With dead ends: 2387 [2022-02-15 03:46:27,326 INFO L226 Difference]: Without dead ends: 2385 [2022-02-15 03:46:27,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=688, Invalid=6284, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 03:46:27,327 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 271 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3178 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 3362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 3178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:46:27,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 116 Invalid, 3362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3178 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 03:46:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2022-02-15 03:46:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2130. [2022-02-15 03:46:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2036 states have (on average 1.219548133595285) internal successors, (2483), 2080 states have internal predecessors, (2483), 65 states have call successors, (65), 29 states have call predecessors, (65), 28 states have return successors, (63), 20 states have call predecessors, (63), 63 states have call successors, (63) [2022-02-15 03:46:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2611 transitions. [2022-02-15 03:46:32,477 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2611 transitions. Word has length 69 [2022-02-15 03:46:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:46:32,477 INFO L470 AbstractCegarLoop]: Abstraction has 2130 states and 2611 transitions. [2022-02-15 03:46:32,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2611 transitions. [2022-02-15 03:46:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:46:32,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:46:32,481 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:46:32,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-15 03:46:32,481 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:46:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:46:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1309954697, now seen corresponding path program 27 times [2022-02-15 03:46:32,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:46:32,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614266273] [2022-02-15 03:46:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:46:32,483 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:46:32,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:46:32,486 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:46:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:33,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:46:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:46:33,459 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:46:33,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614266273] [2022-02-15 03:46:33,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1614266273] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:46:33,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:46:33,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 03:46:33,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311456978] [2022-02-15 03:46:33,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:46:33,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 03:46:33,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:46:33,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 03:46:33,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 03:46:33,460 INFO L87 Difference]: Start difference. First operand 2130 states and 2611 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:46:41,948 INFO L93 Difference]: Finished difference Result 2429 states and 2973 transitions. [2022-02-15 03:46:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 03:46:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:46:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:46:41,952 INFO L225 Difference]: With dead ends: 2429 [2022-02-15 03:46:41,952 INFO L226 Difference]: Without dead ends: 2427 [2022-02-15 03:46:41,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=784, Invalid=7588, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 03:46:41,953 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 288 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3189 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 3372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:46:41,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 137 Invalid, 3372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3189 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 03:46:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-02-15 03:46:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2203. [2022-02-15 03:46:46,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2103 states have (on average 1.2201616737993344) internal successors, (2566), 2152 states have internal predecessors, (2566), 70 states have call successors, (70), 30 states have call predecessors, (70), 29 states have return successors, (68), 20 states have call predecessors, (68), 68 states have call successors, (68) [2022-02-15 03:46:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 2704 transitions. [2022-02-15 03:46:46,932 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 2704 transitions. Word has length 69 [2022-02-15 03:46:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:46:46,932 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 2704 transitions. [2022-02-15 03:46:46,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:46,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 2704 transitions. [2022-02-15 03:46:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:46:46,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:46:46,935 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:46:46,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-15 03:46:46,935 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:46:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:46:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2085009899, now seen corresponding path program 28 times [2022-02-15 03:46:46,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:46:46,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920054957] [2022-02-15 03:46:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:46:46,937 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:46:46,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:46:46,940 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:46:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:47,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:46:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:46:47,887 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:46:47,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920054957] [2022-02-15 03:46:47,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [920054957] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:46:47,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:46:47,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 03:46:47,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618725784] [2022-02-15 03:46:47,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:46:47,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 03:46:47,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:46:47,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 03:46:47,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:46:47,888 INFO L87 Difference]: Start difference. First operand 2203 states and 2704 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:46:55,634 INFO L93 Difference]: Finished difference Result 2453 states and 3004 transitions. [2022-02-15 03:46:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 03:46:55,634 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:46:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:46:55,637 INFO L225 Difference]: With dead ends: 2453 [2022-02-15 03:46:55,637 INFO L226 Difference]: Without dead ends: 2451 [2022-02-15 03:46:55,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=630, Invalid=4920, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 03:46:55,638 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 301 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:46:55,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 111 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:46:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-02-15 03:46:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2231. [2022-02-15 03:46:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2130 states have (on average 1.2211267605633802) internal successors, (2601), 2179 states have internal predecessors, (2601), 70 states have call successors, (70), 31 states have call predecessors, (70), 30 states have return successors, (68), 20 states have call predecessors, (68), 68 states have call successors, (68) [2022-02-15 03:46:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 2739 transitions. [2022-02-15 03:46:59,680 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 2739 transitions. Word has length 69 [2022-02-15 03:46:59,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:46:59,680 INFO L470 AbstractCegarLoop]: Abstraction has 2231 states and 2739 transitions. [2022-02-15 03:46:59,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 2739 transitions. [2022-02-15 03:46:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:46:59,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:46:59,683 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:46:59,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-15 03:46:59,683 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:46:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:46:59,683 INFO L85 PathProgramCache]: Analyzing trace with hash 898307121, now seen corresponding path program 29 times [2022-02-15 03:46:59,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:46:59,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042212802] [2022-02-15 03:46:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:46:59,684 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:46:59,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:46:59,686 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:46:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:00,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:47:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:47:00,497 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:47:00,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042212802] [2022-02-15 03:47:00,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042212802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:47:00,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:47:00,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 03:47:00,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366600674] [2022-02-15 03:47:00,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:47:00,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 03:47:00,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:47:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 03:47:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:47:00,499 INFO L87 Difference]: Start difference. First operand 2231 states and 2739 transitions. Second operand has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:47:08,237 INFO L93 Difference]: Finished difference Result 2523 states and 3082 transitions. [2022-02-15 03:47:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 03:47:08,238 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:47:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:47:08,241 INFO L225 Difference]: With dead ends: 2523 [2022-02-15 03:47:08,241 INFO L226 Difference]: Without dead ends: 2521 [2022-02-15 03:47:08,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=765, Invalid=6717, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 03:47:08,242 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 325 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:47:08,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 107 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 03:47:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2022-02-15 03:47:12,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2238. [2022-02-15 03:47:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2137 states have (on average 1.2208703790360318) internal successors, (2609), 2185 states have internal predecessors, (2609), 69 states have call successors, (69), 32 states have call predecessors, (69), 31 states have return successors, (67), 20 states have call predecessors, (67), 67 states have call successors, (67) [2022-02-15 03:47:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 2745 transitions. [2022-02-15 03:47:12,321 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 2745 transitions. Word has length 69 [2022-02-15 03:47:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:47:12,321 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 2745 transitions. [2022-02-15 03:47:12,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 2745 transitions. [2022-02-15 03:47:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:47:12,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:47:12,324 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:47:12,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-15 03:47:12,324 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:47:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:47:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1869063899, now seen corresponding path program 30 times [2022-02-15 03:47:12,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:47:12,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982705877] [2022-02-15 03:47:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:47:12,325 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:47:12,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:47:12,327 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:47:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:13,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:47:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:47:13,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:47:13,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982705877] [2022-02-15 03:47:13,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1982705877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:47:13,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:47:13,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:47:13,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452610636] [2022-02-15 03:47:13,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:47:13,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:47:13,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:47:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:47:13,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:47:13,047 INFO L87 Difference]: Start difference. First operand 2238 states and 2745 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:47:21,316 INFO L93 Difference]: Finished difference Result 2528 states and 3094 transitions. [2022-02-15 03:47:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 03:47:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:47:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:47:21,321 INFO L225 Difference]: With dead ends: 2528 [2022-02-15 03:47:21,321 INFO L226 Difference]: Without dead ends: 2526 [2022-02-15 03:47:21,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=750, Invalid=6732, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 03:47:21,322 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 196 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2886 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 3080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:47:21,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 132 Invalid, 3080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2886 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 03:47:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2022-02-15 03:47:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 2171. [2022-02-15 03:47:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2074 states have (on average 1.220347155255545) internal successors, (2531), 2119 states have internal predecessors, (2531), 66 states have call successors, (66), 31 states have call predecessors, (66), 30 states have return successors, (64), 20 states have call predecessors, (64), 64 states have call successors, (64) [2022-02-15 03:47:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 2661 transitions. [2022-02-15 03:47:25,178 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 2661 transitions. Word has length 69 [2022-02-15 03:47:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:47:25,178 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 2661 transitions. [2022-02-15 03:47:25,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 2661 transitions. [2022-02-15 03:47:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:47:25,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:47:25,180 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:47:25,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-15 03:47:25,181 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:47:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:47:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1475670698, now seen corresponding path program 22 times [2022-02-15 03:47:25,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:47:25,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487017563] [2022-02-15 03:47:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:47:25,182 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:47:25,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:47:25,184 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:47:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:25,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:47:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:25,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 03:47:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:26,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 03:47:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:47:26,004 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:47:26,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487017563] [2022-02-15 03:47:26,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [487017563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:47:26,005 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:47:26,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 03:47:26,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215817343] [2022-02-15 03:47:26,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:47:26,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 03:47:26,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:47:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 03:47:26,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:47:26,006 INFO L87 Difference]: Start difference. First operand 2171 states and 2661 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:47:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:47:31,962 INFO L93 Difference]: Finished difference Result 2218 states and 2712 transitions. [2022-02-15 03:47:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 03:47:31,963 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2022-02-15 03:47:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:47:31,966 INFO L225 Difference]: With dead ends: 2218 [2022-02-15 03:47:31,966 INFO L226 Difference]: Without dead ends: 2198 [2022-02-15 03:47:31,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=476, Invalid=4636, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 03:47:31,967 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 149 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:47:31,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 94 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:47:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2022-02-15 03:47:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 2162. [2022-02-15 03:47:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2065 states have (on average 1.219370460048426) internal successors, (2518), 2110 states have internal predecessors, (2518), 66 states have call successors, (66), 31 states have call predecessors, (66), 30 states have return successors, (64), 20 states have call predecessors, (64), 64 states have call successors, (64) [2022-02-15 03:47:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 2648 transitions. [2022-02-15 03:47:35,972 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 2648 transitions. Word has length 72 [2022-02-15 03:47:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:47:35,972 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 2648 transitions. [2022-02-15 03:47:35,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:47:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 2648 transitions. [2022-02-15 03:47:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:47:35,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:47:35,974 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:47:35,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-15 03:47:35,974 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:47:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:47:35,975 INFO L85 PathProgramCache]: Analyzing trace with hash -501669198, now seen corresponding path program 9 times [2022-02-15 03:47:35,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:47:35,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624783388] [2022-02-15 03:47:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:47:35,976 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:47:35,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:47:35,978 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:47:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:36,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:47:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:36,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 03:47:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:36,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 03:47:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:36,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-15 03:47:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:47:36,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:47:36,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624783388] [2022-02-15 03:47:36,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [624783388] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:47:36,358 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:47:36,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 03:47:36,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074953230] [2022-02-15 03:47:36,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:47:36,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 03:47:36,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:47:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 03:47:36,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:47:36,359 INFO L87 Difference]: Start difference. First operand 2162 states and 2648 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 03:47:42,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:47:42,308 INFO L93 Difference]: Finished difference Result 2224 states and 2720 transitions. [2022-02-15 03:47:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 03:47:42,308 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 73 [2022-02-15 03:47:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:47:42,312 INFO L225 Difference]: With dead ends: 2224 [2022-02-15 03:47:42,312 INFO L226 Difference]: Without dead ends: 2222 [2022-02-15 03:47:42,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:47:42,313 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 205 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:47:42,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 64 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:47:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2022-02-15 03:47:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2204. [2022-02-15 03:47:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2096 states have (on average 1.2161259541984732) internal successors, (2549), 2142 states have internal predecessors, (2549), 76 states have call successors, (76), 32 states have call predecessors, (76), 31 states have return successors, (74), 29 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-15 03:47:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2699 transitions. [2022-02-15 03:47:46,524 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2699 transitions. Word has length 73 [2022-02-15 03:47:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:47:46,524 INFO L470 AbstractCegarLoop]: Abstraction has 2204 states and 2699 transitions. [2022-02-15 03:47:46,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 03:47:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2699 transitions. [2022-02-15 03:47:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:47:46,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:47:46,527 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:47:46,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-15 03:47:46,527 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:47:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:47:46,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1791898001, now seen corresponding path program 22 times [2022-02-15 03:47:46,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:47:46,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460608305] [2022-02-15 03:47:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:47:46,528 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:47:46,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:47:46,530 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:47:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:47,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:47:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:47,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 03:47:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:47:47,045 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:47:47,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460608305] [2022-02-15 03:47:47,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [460608305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:47:47,045 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:47:47,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 03:47:47,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479988139] [2022-02-15 03:47:47,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:47:47,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 03:47:47,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:47:47,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 03:47:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:47:47,046 INFO L87 Difference]: Start difference. First operand 2204 states and 2699 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:47:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:47:55,488 INFO L93 Difference]: Finished difference Result 2453 states and 2993 transitions. [2022-02-15 03:47:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 03:47:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 03:47:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:47:55,491 INFO L225 Difference]: With dead ends: 2453 [2022-02-15 03:47:55,491 INFO L226 Difference]: Without dead ends: 2451 [2022-02-15 03:47:55,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=444, Invalid=4248, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 03:47:55,493 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 312 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:47:55,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 120 Invalid, 2538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:47:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-02-15 03:48:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2233. [2022-02-15 03:48:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2124 states have (on average 1.216572504708098) internal successors, (2584), 2170 states have internal predecessors, (2584), 76 states have call successors, (76), 33 states have call predecessors, (76), 32 states have return successors, (74), 29 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-15 03:48:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 2734 transitions. [2022-02-15 03:48:00,738 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 2734 transitions. Word has length 71 [2022-02-15 03:48:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:48:00,738 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 2734 transitions. [2022-02-15 03:48:00,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:48:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 2734 transitions. [2022-02-15 03:48:00,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:48:00,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:48:00,741 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:48:00,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-15 03:48:00,742 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:48:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:48:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2027609937, now seen corresponding path program 23 times [2022-02-15 03:48:00,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:48:00,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812710125] [2022-02-15 03:48:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:48:00,743 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:48:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:48:00,746 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:48:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:01,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:48:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:01,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 03:48:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:48:01,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:48:01,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812710125] [2022-02-15 03:48:01,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812710125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:48:01,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:48:01,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:48:01,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35871822] [2022-02-15 03:48:01,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:48:01,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:48:01,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:48:01,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:48:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:48:01,402 INFO L87 Difference]: Start difference. First operand 2233 states and 2734 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:48:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:48:08,576 INFO L93 Difference]: Finished difference Result 2414 states and 2948 transitions. [2022-02-15 03:48:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 03:48:08,576 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 03:48:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:48:08,580 INFO L225 Difference]: With dead ends: 2414 [2022-02-15 03:48:08,580 INFO L226 Difference]: Without dead ends: 2412 [2022-02-15 03:48:08,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=3681, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 03:48:08,580 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 327 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:48:08,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 151 Invalid, 2829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2662 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:48:08,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2022-02-15 03:48:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2278. [2022-02-15 03:48:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2168 states have (on average 1.2172509225092252) internal successors, (2639), 2214 states have internal predecessors, (2639), 76 states have call successors, (76), 34 states have call predecessors, (76), 33 states have return successors, (74), 29 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-15 03:48:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 2789 transitions. [2022-02-15 03:48:13,194 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 2789 transitions. Word has length 71 [2022-02-15 03:48:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:48:13,194 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 2789 transitions. [2022-02-15 03:48:13,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:48:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 2789 transitions. [2022-02-15 03:48:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:48:13,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:48:13,197 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:48:13,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-15 03:48:13,198 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:48:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:48:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash 952313571, now seen corresponding path program 24 times [2022-02-15 03:48:13,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:48:13,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747506373] [2022-02-15 03:48:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:48:13,199 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:48:13,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:48:13,201 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:48:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:13,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:48:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:13,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 03:48:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:48:13,774 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:48:13,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747506373] [2022-02-15 03:48:13,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [747506373] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:48:13,774 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:48:13,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:48:13,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982092412] [2022-02-15 03:48:13,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:48:13,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:48:13,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:48:13,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:48:13,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:48:13,775 INFO L87 Difference]: Start difference. First operand 2278 states and 2789 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:48:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:48:22,834 INFO L93 Difference]: Finished difference Result 2506 states and 3061 transitions. [2022-02-15 03:48:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 03:48:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 03:48:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:48:22,839 INFO L225 Difference]: With dead ends: 2506 [2022-02-15 03:48:22,839 INFO L226 Difference]: Without dead ends: 2504 [2022-02-15 03:48:22,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=512, Invalid=4744, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 03:48:22,840 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 252 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2826 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:48:22,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 158 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2826 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 03:48:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2022-02-15 03:48:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2321. [2022-02-15 03:48:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2210 states have (on average 1.219004524886878) internal successors, (2694), 2256 states have internal predecessors, (2694), 76 states have call successors, (76), 35 states have call predecessors, (76), 34 states have return successors, (74), 29 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-15 03:48:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 2844 transitions. [2022-02-15 03:48:28,504 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 2844 transitions. Word has length 71 [2022-02-15 03:48:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:48:28,504 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 2844 transitions. [2022-02-15 03:48:28,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:48:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 2844 transitions. [2022-02-15 03:48:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:48:28,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:48:28,512 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:48:28,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-15 03:48:28,513 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:48:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:48:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash 130276137, now seen corresponding path program 25 times [2022-02-15 03:48:28,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:48:28,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854046420] [2022-02-15 03:48:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:48:28,514 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:48:28,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:48:28,517 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:48:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:28,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:48:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:29,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 03:48:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:48:29,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:48:29,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854046420] [2022-02-15 03:48:29,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1854046420] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:48:29,003 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:48:29,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 03:48:29,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633804333] [2022-02-15 03:48:29,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:48:29,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 03:48:29,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:48:29,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 03:48:29,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:48:29,004 INFO L87 Difference]: Start difference. First operand 2321 states and 2844 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:48:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:48:37,989 INFO L93 Difference]: Finished difference Result 2722 states and 3338 transitions. [2022-02-15 03:48:37,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 03:48:37,990 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 03:48:37,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:48:37,993 INFO L225 Difference]: With dead ends: 2722 [2022-02-15 03:48:37,993 INFO L226 Difference]: Without dead ends: 2720 [2022-02-15 03:48:37,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=723, Invalid=4679, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 03:48:37,994 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 386 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:48:37,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 110 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:48:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2022-02-15 03:48:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2351. [2022-02-15 03:48:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2240 states have (on average 1.2205357142857143) internal successors, (2734), 2286 states have internal predecessors, (2734), 76 states have call successors, (76), 35 states have call predecessors, (76), 34 states have return successors, (74), 29 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-15 03:48:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 2884 transitions. [2022-02-15 03:48:42,473 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 2884 transitions. Word has length 71 [2022-02-15 03:48:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:48:42,473 INFO L470 AbstractCegarLoop]: Abstraction has 2351 states and 2884 transitions. [2022-02-15 03:48:42,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:48:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 2884 transitions. [2022-02-15 03:48:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:48:42,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:48:42,476 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:48:42,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-15 03:48:42,476 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:48:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:48:42,477 INFO L85 PathProgramCache]: Analyzing trace with hash -945381923, now seen corresponding path program 26 times [2022-02-15 03:48:42,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:48:42,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388996775] [2022-02-15 03:48:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:48:42,478 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:48:42,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:48:42,482 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:48:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:48:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:42,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 03:48:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:48:42,972 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:48:42,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388996775] [2022-02-15 03:48:42,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388996775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:48:42,972 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:48:42,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 03:48:42,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117660351] [2022-02-15 03:48:42,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:48:42,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 03:48:42,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:48:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 03:48:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:48:42,973 INFO L87 Difference]: Start difference. First operand 2351 states and 2884 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:48:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:48:50,935 INFO L93 Difference]: Finished difference Result 2448 states and 2999 transitions. [2022-02-15 03:48:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 03:48:50,936 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 03:48:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:48:50,939 INFO L225 Difference]: With dead ends: 2448 [2022-02-15 03:48:50,939 INFO L226 Difference]: Without dead ends: 2446 [2022-02-15 03:48:50,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=2548, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 03:48:50,940 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 160 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:48:50,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 149 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:48:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2022-02-15 03:48:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2362. [2022-02-15 03:48:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2252 states have (on average 1.2215808170515097) internal successors, (2751), 2298 states have internal predecessors, (2751), 75 states have call successors, (75), 35 states have call predecessors, (75), 34 states have return successors, (73), 28 states have call predecessors, (73), 73 states have call successors, (73) [2022-02-15 03:48:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 2899 transitions. [2022-02-15 03:48:55,426 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 2899 transitions. Word has length 71 [2022-02-15 03:48:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:48:55,426 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 2899 transitions. [2022-02-15 03:48:55,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:48:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 2899 transitions. [2022-02-15 03:48:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:48:55,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:48:55,428 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:48:55,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-15 03:48:55,429 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:48:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:48:55,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1767419357, now seen corresponding path program 27 times [2022-02-15 03:48:55,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:48:55,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432504555] [2022-02-15 03:48:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:48:55,430 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:48:55,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:48:55,432 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:48:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:55,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:48:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:55,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 03:48:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:48:55,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:48:55,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432504555] [2022-02-15 03:48:55,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [432504555] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:48:55,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:48:55,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:48:55,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616206747] [2022-02-15 03:48:55,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:48:55,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:48:55,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:48:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:48:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:48:55,981 INFO L87 Difference]: Start difference. First operand 2362 states and 2899 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:49:04,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:49:04,610 INFO L93 Difference]: Finished difference Result 2540 states and 3104 transitions. [2022-02-15 03:49:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 03:49:04,611 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 03:49:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:49:04,615 INFO L225 Difference]: With dead ends: 2540 [2022-02-15 03:49:04,615 INFO L226 Difference]: Without dead ends: 2538 [2022-02-15 03:49:04,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=534, Invalid=4868, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 03:49:04,618 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 345 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:49:04,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 135 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2426 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:49:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2022-02-15 03:49:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2368. [2022-02-15 03:49:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2258 states have (on average 1.2218777679362267) internal successors, (2759), 2304 states have internal predecessors, (2759), 75 states have call successors, (75), 35 states have call predecessors, (75), 34 states have return successors, (73), 28 states have call predecessors, (73), 73 states have call successors, (73) [2022-02-15 03:49:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 2907 transitions. [2022-02-15 03:49:10,212 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 2907 transitions. Word has length 71 [2022-02-15 03:49:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:49:10,212 INFO L470 AbstractCegarLoop]: Abstraction has 2368 states and 2907 transitions. [2022-02-15 03:49:10,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:49:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 2907 transitions. [2022-02-15 03:49:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:49:10,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:49:10,216 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:49:10,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-15 03:49:10,217 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:49:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:49:10,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2062115907, now seen corresponding path program 23 times [2022-02-15 03:49:10,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:49:10,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343928834] [2022-02-15 03:49:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:49:10,219 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:49:10,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:49:10,222 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:49:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:11,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:49:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:11,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 03:49:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:49:11,171 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:49:11,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343928834] [2022-02-15 03:49:11,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1343928834] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:49:11,172 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:49:11,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 03:49:11,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342169565] [2022-02-15 03:49:11,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:49:11,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 03:49:11,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:49:11,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 03:49:11,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 03:49:11,173 INFO L87 Difference]: Start difference. First operand 2368 states and 2907 transitions. Second operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:49:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:49:22,502 INFO L93 Difference]: Finished difference Result 2641 states and 3232 transitions. [2022-02-15 03:49:22,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-15 03:49:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 03:49:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:49:22,506 INFO L225 Difference]: With dead ends: 2641 [2022-02-15 03:49:22,506 INFO L226 Difference]: Without dead ends: 2639 [2022-02-15 03:49:22,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1948, Invalid=13552, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 03:49:22,507 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 364 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:49:22,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 128 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 03:49:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-02-15 03:49:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2419. [2022-02-15 03:49:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2304 states have (on average 1.2200520833333333) internal successors, (2811), 2352 states have internal predecessors, (2811), 79 states have call successors, (79), 36 states have call predecessors, (79), 35 states have return successors, (77), 30 states have call predecessors, (77), 77 states have call successors, (77) [2022-02-15 03:49:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 2967 transitions. [2022-02-15 03:49:27,398 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 2967 transitions. Word has length 72 [2022-02-15 03:49:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:49:27,398 INFO L470 AbstractCegarLoop]: Abstraction has 2419 states and 2967 transitions. [2022-02-15 03:49:27,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:49:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 2967 transitions. [2022-02-15 03:49:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:49:27,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:49:27,401 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:49:27,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-15 03:49:27,401 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:49:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:49:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1824795895, now seen corresponding path program 24 times [2022-02-15 03:49:27,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:49:27,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645391254] [2022-02-15 03:49:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:49:27,403 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:49:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:49:27,405 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:49:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:28,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:49:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:28,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 03:49:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:49:28,057 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:49:28,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645391254] [2022-02-15 03:49:28,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [645391254] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:49:28,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:49:28,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 03:49:28,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926957760] [2022-02-15 03:49:28,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:49:28,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 03:49:28,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:49:28,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 03:49:28,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 03:49:28,059 INFO L87 Difference]: Start difference. First operand 2419 states and 2967 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:49:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:49:36,698 INFO L93 Difference]: Finished difference Result 2576 states and 3157 transitions. [2022-02-15 03:49:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 03:49:36,699 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 03:49:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:49:36,702 INFO L225 Difference]: With dead ends: 2576 [2022-02-15 03:49:36,702 INFO L226 Difference]: Without dead ends: 2574 [2022-02-15 03:49:36,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1168, Invalid=5804, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 03:49:36,703 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 224 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:49:36,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 125 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:49:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2022-02-15 03:49:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2422. [2022-02-15 03:49:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2307 states have (on average 1.2201993931512787) internal successors, (2815), 2355 states have internal predecessors, (2815), 79 states have call successors, (79), 36 states have call predecessors, (79), 35 states have return successors, (77), 30 states have call predecessors, (77), 77 states have call successors, (77) [2022-02-15 03:49:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2971 transitions. [2022-02-15 03:49:42,206 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2971 transitions. Word has length 72 [2022-02-15 03:49:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:49:42,206 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 2971 transitions. [2022-02-15 03:49:42,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:49:42,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2971 transitions. [2022-02-15 03:49:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:49:42,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:49:42,210 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:49:42,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-15 03:49:42,210 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:49:42,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:49:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1689804415, now seen corresponding path program 25 times [2022-02-15 03:49:42,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:49:42,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874167942] [2022-02-15 03:49:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:49:42,212 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:49:42,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:49:42,215 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:49:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:43,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:49:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:43,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 03:49:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:49:43,312 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:49:43,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874167942] [2022-02-15 03:49:43,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874167942] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:49:43,312 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:49:43,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 03:49:43,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751986426] [2022-02-15 03:49:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:49:43,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 03:49:43,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:49:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 03:49:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 03:49:43,314 INFO L87 Difference]: Start difference. First operand 2422 states and 2971 transitions. Second operand has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:49:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:49:53,495 INFO L93 Difference]: Finished difference Result 2607 states and 3196 transitions. [2022-02-15 03:49:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 03:49:53,496 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 03:49:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:49:53,499 INFO L225 Difference]: With dead ends: 2607 [2022-02-15 03:49:53,499 INFO L226 Difference]: Without dead ends: 2605 [2022-02-15 03:49:53,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1170, Invalid=9960, Unknown=0, NotChecked=0, Total=11130 [2022-02-15 03:49:53,501 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 280 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:49:53,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 125 Invalid, 2946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 2696 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 03:49:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2022-02-15 03:49:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2447. [2022-02-15 03:49:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2330 states have (on average 1.2201716738197426) internal successors, (2843), 2379 states have internal predecessors, (2843), 80 states have call successors, (80), 37 states have call predecessors, (80), 36 states have return successors, (78), 30 states have call predecessors, (78), 78 states have call successors, (78) [2022-02-15 03:49:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3001 transitions. [2022-02-15 03:49:59,435 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3001 transitions. Word has length 72 [2022-02-15 03:49:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:49:59,435 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 3001 transitions. [2022-02-15 03:49:59,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:49:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3001 transitions. [2022-02-15 03:49:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:49:59,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:49:59,439 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:49:59,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-15 03:49:59,439 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:49:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:49:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1751714111, now seen corresponding path program 26 times [2022-02-15 03:49:59,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:49:59,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510710163] [2022-02-15 03:49:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:49:59,442 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:49:59,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:49:59,445 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:49:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:00,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:50:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:00,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 03:50:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:50:00,383 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:50:00,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510710163] [2022-02-15 03:50:00,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [510710163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:50:00,384 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:50:00,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 03:50:00,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500232546] [2022-02-15 03:50:00,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:50:00,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 03:50:00,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:50:00,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 03:50:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 03:50:00,385 INFO L87 Difference]: Start difference. First operand 2447 states and 3001 transitions. Second operand has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:50:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:50:10,425 INFO L93 Difference]: Finished difference Result 2551 states and 3127 transitions. [2022-02-15 03:50:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 03:50:10,425 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 03:50:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:50:10,428 INFO L225 Difference]: With dead ends: 2551 [2022-02-15 03:50:10,429 INFO L226 Difference]: Without dead ends: 2549 [2022-02-15 03:50:10,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1072, Invalid=8048, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 03:50:10,429 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 332 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:50:10,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 81 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:50:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-02-15 03:50:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2461. [2022-02-15 03:50:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2461 states, 2341 states have (on average 1.2191371208885091) internal successors, (2854), 2391 states have internal predecessors, (2854), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (80), 31 states have call predecessors, (80), 80 states have call successors, (80) [2022-02-15 03:50:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 3016 transitions. [2022-02-15 03:50:15,392 INFO L78 Accepts]: Start accepts. Automaton has 2461 states and 3016 transitions. Word has length 72 [2022-02-15 03:50:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:50:15,392 INFO L470 AbstractCegarLoop]: Abstraction has 2461 states and 3016 transitions. [2022-02-15 03:50:15,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:50:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2461 states and 3016 transitions. [2022-02-15 03:50:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:50:15,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:50:15,395 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:50:15,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-02-15 03:50:15,395 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:50:15,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:50:15,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2091436369, now seen corresponding path program 27 times [2022-02-15 03:50:15,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:50:15,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789962168] [2022-02-15 03:50:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:50:15,396 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:50:15,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:50:15,398 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:50:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:16,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:50:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:16,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 03:50:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:50:16,497 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:50:16,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789962168] [2022-02-15 03:50:16,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [789962168] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:50:16,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:50:16,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 03:50:16,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027809691] [2022-02-15 03:50:16,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:50:16,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 03:50:16,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:50:16,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 03:50:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:50:16,499 INFO L87 Difference]: Start difference. First operand 2461 states and 3016 transitions. Second operand has 36 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:50:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:50:28,074 INFO L93 Difference]: Finished difference Result 2748 states and 3360 transitions. [2022-02-15 03:50:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-15 03:50:28,075 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 03:50:28,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:50:28,080 INFO L225 Difference]: With dead ends: 2748 [2022-02-15 03:50:28,080 INFO L226 Difference]: Without dead ends: 2746 [2022-02-15 03:50:28,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1742, Invalid=13020, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 03:50:28,082 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 298 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 4122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:50:28,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 134 Invalid, 4122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 03:50:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2022-02-15 03:50:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2438. [2022-02-15 03:50:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2323 states have (on average 1.2208351269909599) internal successors, (2836), 2371 states have internal predecessors, (2836), 78 states have call successors, (78), 37 states have call predecessors, (78), 36 states have return successors, (76), 29 states have call predecessors, (76), 76 states have call successors, (76) [2022-02-15 03:50:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2990 transitions. [2022-02-15 03:50:33,836 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2990 transitions. Word has length 72 [2022-02-15 03:50:33,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:50:33,836 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 2990 transitions. [2022-02-15 03:50:33,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:50:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2990 transitions. [2022-02-15 03:50:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:50:33,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:50:33,839 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:50:33,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-02-15 03:50:33,839 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:50:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:50:33,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1311069383, now seen corresponding path program 28 times [2022-02-15 03:50:33,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:50:33,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622254261] [2022-02-15 03:50:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:50:33,840 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:50:33,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:50:33,843 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:50:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:34,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:50:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:34,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 03:50:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:50:34,704 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:50:34,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622254261] [2022-02-15 03:50:34,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [622254261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:50:34,705 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:50:34,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 03:50:34,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878960966] [2022-02-15 03:50:34,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:50:34,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 03:50:34,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:50:34,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 03:50:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 03:50:34,705 INFO L87 Difference]: Start difference. First operand 2438 states and 2990 transitions. Second operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:50:42,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:50:42,521 INFO L93 Difference]: Finished difference Result 2594 states and 3176 transitions. [2022-02-15 03:50:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 03:50:42,521 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 03:50:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:50:42,524 INFO L225 Difference]: With dead ends: 2594 [2022-02-15 03:50:42,524 INFO L226 Difference]: Without dead ends: 2592 [2022-02-15 03:50:42,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=787, Invalid=6185, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 03:50:42,525 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 172 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:50:42,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 105 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:50:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2022-02-15 03:50:48,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2438. [2022-02-15 03:50:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2323 states have (on average 1.2208351269909599) internal successors, (2836), 2371 states have internal predecessors, (2836), 78 states have call successors, (78), 37 states have call predecessors, (78), 36 states have return successors, (76), 29 states have call predecessors, (76), 76 states have call successors, (76) [2022-02-15 03:50:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2990 transitions. [2022-02-15 03:50:48,221 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2990 transitions. Word has length 72 [2022-02-15 03:50:48,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:50:48,221 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 2990 transitions. [2022-02-15 03:50:48,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 03:50:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2990 transitions. [2022-02-15 03:50:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:50:48,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:50:48,225 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:50:48,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-02-15 03:50:48,225 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:50:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:50:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1383260442, now seen corresponding path program 32 times [2022-02-15 03:50:48,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:50:48,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648575999] [2022-02-15 03:50:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:50:48,239 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:50:48,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:50:48,242 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:50:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:49,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:50:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:50:49,419 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:50:49,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648575999] [2022-02-15 03:50:49,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [648575999] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:50:49,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:50:49,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 03:50:49,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971798649] [2022-02-15 03:50:49,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:50:49,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 03:50:49,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:50:49,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 03:50:49,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 03:50:49,420 INFO L87 Difference]: Start difference. First operand 2438 states and 2990 transitions. Second operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:00,045 INFO L93 Difference]: Finished difference Result 3027 states and 3720 transitions. [2022-02-15 03:51:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 03:51:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 03:51:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:00,049 INFO L225 Difference]: With dead ends: 3027 [2022-02-15 03:51:00,050 INFO L226 Difference]: Without dead ends: 3025 [2022-02-15 03:51:00,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=783, Invalid=5697, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 03:51:00,050 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 646 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:00,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 80 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:51:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2022-02-15 03:51:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2491. [2022-02-15 03:51:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2369 states have (on average 1.2199240185732376) internal successors, (2890), 2420 states have internal predecessors, (2890), 81 states have call successors, (81), 41 states have call predecessors, (81), 40 states have return successors, (79), 29 states have call predecessors, (79), 79 states have call successors, (79) [2022-02-15 03:51:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 3050 transitions. [2022-02-15 03:51:05,197 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 3050 transitions. Word has length 71 [2022-02-15 03:51:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:05,198 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 3050 transitions. [2022-02-15 03:51:05,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 3050 transitions. [2022-02-15 03:51:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:51:05,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:05,200 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:51:05,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-02-15 03:51:05,201 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash 538358054, now seen corresponding path program 33 times [2022-02-15 03:51:05,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:05,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177600021] [2022-02-15 03:51:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:05,202 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:05,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:05,204 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:05,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:51:05,869 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:05,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177600021] [2022-02-15 03:51:05,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [177600021] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:05,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:05,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 03:51:05,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951705226] [2022-02-15 03:51:05,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:05,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 03:51:05,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 03:51:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:51:05,871 INFO L87 Difference]: Start difference. First operand 2491 states and 3050 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:13,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:13,842 INFO L93 Difference]: Finished difference Result 2671 states and 3265 transitions. [2022-02-15 03:51:13,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 03:51:13,842 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 03:51:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:13,845 INFO L225 Difference]: With dead ends: 2671 [2022-02-15 03:51:13,846 INFO L226 Difference]: Without dead ends: 2669 [2022-02-15 03:51:13,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=771, Invalid=3135, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 03:51:13,846 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 182 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:13,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 62 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:51:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2022-02-15 03:51:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2485. [2022-02-15 03:51:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2485 states, 2365 states have (on average 1.2202959830866809) internal successors, (2886), 2414 states have internal predecessors, (2886), 79 states have call successors, (79), 41 states have call predecessors, (79), 40 states have return successors, (77), 29 states have call predecessors, (77), 77 states have call successors, (77) [2022-02-15 03:51:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 3042 transitions. [2022-02-15 03:51:20,336 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 3042 transitions. Word has length 71 [2022-02-15 03:51:20,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:20,336 INFO L470 AbstractCegarLoop]: Abstraction has 2485 states and 3042 transitions. [2022-02-15 03:51:20,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 3042 transitions. [2022-02-15 03:51:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:51:20,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:20,339 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:51:20,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-02-15 03:51:20,340 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1329173350, now seen corresponding path program 34 times [2022-02-15 03:51:20,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:20,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88772541] [2022-02-15 03:51:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:20,341 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:20,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:20,344 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:21,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:51:21,424 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:21,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88772541] [2022-02-15 03:51:21,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [88772541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:21,425 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:21,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 03:51:21,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044629099] [2022-02-15 03:51:21,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:21,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 03:51:21,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:21,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 03:51:21,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 03:51:21,426 INFO L87 Difference]: Start difference. First operand 2485 states and 3042 transitions. Second operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:29,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:29,275 INFO L93 Difference]: Finished difference Result 2648 states and 3236 transitions. [2022-02-15 03:51:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 03:51:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 03:51:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:29,278 INFO L225 Difference]: With dead ends: 2648 [2022-02-15 03:51:29,279 INFO L226 Difference]: Without dead ends: 2646 [2022-02-15 03:51:29,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=602, Invalid=4368, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 03:51:29,279 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 406 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:29,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 61 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:51:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2022-02-15 03:51:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2528. [2022-02-15 03:51:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2404 states have (on average 1.2204658901830283) internal successors, (2934), 2456 states have internal predecessors, (2934), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (80), 29 states have call predecessors, (80), 80 states have call successors, (80) [2022-02-15 03:51:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 3096 transitions. [2022-02-15 03:51:35,466 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 3096 transitions. Word has length 71 [2022-02-15 03:51:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:35,466 INFO L470 AbstractCegarLoop]: Abstraction has 2528 states and 3096 transitions. [2022-02-15 03:51:35,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 3096 transitions. [2022-02-15 03:51:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 03:51:35,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:35,470 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:51:35,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-02-15 03:51:35,470 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:35,470 INFO L85 PathProgramCache]: Analyzing trace with hash 218298293, now seen corresponding path program 28 times [2022-02-15 03:51:35,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:35,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298322840] [2022-02-15 03:51:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:35,472 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:35,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:35,475 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:36,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:36,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 03:51:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:36,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 03:51:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:51:36,242 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:36,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298322840] [2022-02-15 03:51:36,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [298322840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:36,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:36,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 03:51:36,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888688756] [2022-02-15 03:51:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:36,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 03:51:36,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 03:51:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:51:36,243 INFO L87 Difference]: Start difference. First operand 2528 states and 3096 transitions. Second operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:51:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:45,438 INFO L93 Difference]: Finished difference Result 2676 states and 3272 transitions. [2022-02-15 03:51:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 03:51:45,438 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2022-02-15 03:51:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:45,441 INFO L225 Difference]: With dead ends: 2676 [2022-02-15 03:51:45,441 INFO L226 Difference]: Without dead ends: 2674 [2022-02-15 03:51:45,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=554, Invalid=5298, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 03:51:45,442 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 261 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2728 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:45,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 105 Invalid, 2901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2728 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 03:51:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-02-15 03:51:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2558. [2022-02-15 03:51:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2432 states have (on average 1.2203947368421053) internal successors, (2968), 2484 states have internal predecessors, (2968), 84 states have call successors, (84), 42 states have call predecessors, (84), 41 states have return successors, (82), 31 states have call predecessors, (82), 82 states have call successors, (82) [2022-02-15 03:51:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 3134 transitions. [2022-02-15 03:51:51,286 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 3134 transitions. Word has length 74 [2022-02-15 03:51:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:51,286 INFO L470 AbstractCegarLoop]: Abstraction has 2558 states and 3134 transitions. [2022-02-15 03:51:51,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:51:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 3134 transitions. [2022-02-15 03:51:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 03:51:51,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:51,290 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:51:51,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-02-15 03:51:51,290 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:51,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash 231121153, now seen corresponding path program 29 times [2022-02-15 03:51:51,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:51,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839969704] [2022-02-15 03:51:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:51,292 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:51,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:51,295 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:52,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:52,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 03:51:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:52,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 03:51:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:51:52,066 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:52,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839969704] [2022-02-15 03:51:52,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [839969704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:52,066 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:52,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 03:51:52,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021084746] [2022-02-15 03:51:52,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:52,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 03:51:52,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:52,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 03:51:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:51:52,067 INFO L87 Difference]: Start difference. First operand 2558 states and 3134 transitions. Second operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:51:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:59,931 INFO L93 Difference]: Finished difference Result 2654 states and 3249 transitions. [2022-02-15 03:51:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 03:51:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2022-02-15 03:51:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:59,935 INFO L225 Difference]: With dead ends: 2654 [2022-02-15 03:51:59,935 INFO L226 Difference]: Without dead ends: 2652 [2022-02-15 03:51:59,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=627, Invalid=4629, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 03:51:59,936 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 219 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:59,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 120 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2040 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:51:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2022-02-15 03:52:06,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2558. [2022-02-15 03:52:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2432 states have (on average 1.2203947368421053) internal successors, (2968), 2484 states have internal predecessors, (2968), 84 states have call successors, (84), 42 states have call predecessors, (84), 41 states have return successors, (82), 31 states have call predecessors, (82), 82 states have call successors, (82) [2022-02-15 03:52:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 3134 transitions. [2022-02-15 03:52:06,041 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 3134 transitions. Word has length 74 [2022-02-15 03:52:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:52:06,042 INFO L470 AbstractCegarLoop]: Abstraction has 2558 states and 3134 transitions. [2022-02-15 03:52:06,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 03:52:06,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 3134 transitions. [2022-02-15 03:52:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:52:06,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:52:06,045 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:52:06,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-02-15 03:52:06,046 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:52:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:52:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash -218179534, now seen corresponding path program 31 times [2022-02-15 03:52:06,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:52:06,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689324013] [2022-02-15 03:52:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:52:06,047 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:52:06,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:52:06,050 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:52:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:52:06,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:52:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:52:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:52:06,582 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:52:06,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689324013] [2022-02-15 03:52:06,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [689324013] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:52:06,582 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:52:06,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:52:06,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7464316] [2022-02-15 03:52:06,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:52:06,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:52:06,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:52:06,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:52:06,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:52:06,583 INFO L87 Difference]: Start difference. First operand 2558 states and 3134 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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)