/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-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 03:38:15,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 03:38:15,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 03:38:15,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 03:38:15,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 03:38:15,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 03:38:15,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 03:38:15,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 03:38:15,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 03:38:15,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 03:38:15,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 03:38:15,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 03:38:15,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 03:38:15,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 03:38:15,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 03:38:15,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 03:38:15,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 03:38:15,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 03:38:15,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 03:38:15,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 03:38:15,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 03:38:15,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 03:38:15,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 03:38:15,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 03:38:15,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-15 03:38:15,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-15 03:38:15,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-15 03:38:15,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-15 03:38:15,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-15 03:38:15,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-15 03:38:15,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-15 03:38:15,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-15 03:38:15,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-15 03:38:15,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-15 03:38:15,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-15 03:38:15,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-15 03:38:15,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-15 03:38:15,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-15 03:38:15,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 03:38:15,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 03:38:15,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 03:38:15,487 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 03:38:15,500 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 03:38:15,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 03:38:15,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 03:38:15,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 03:38:15,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 03:38:15,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 03:38:15,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 03:38:15,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 03:38:15,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 03:38:15,516 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 03:38:15,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 03:38:15,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 03:38:15,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 03:38:15,517 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 03:38:15,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 03:38:15,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:38:15,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 03:38:15,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 03:38:15,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 03:38:15,517 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 03:38:15,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 03:38:15,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 03:38:15,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 03:38:15,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 03:38:15,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 03:38:15,786 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 03:38:15,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2022-02-15 03:38:15,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8037975b7/d7568c746a834f638385eb196f420439/FLAGfb092c1b8 [2022-02-15 03:38:16,233 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 03:38:16,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2022-02-15 03:38:16,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8037975b7/d7568c746a834f638385eb196f420439/FLAGfb092c1b8 [2022-02-15 03:38:16,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8037975b7/d7568c746a834f638385eb196f420439 [2022-02-15 03:38:16,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 03:38:16,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 03:38:16,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 03:38:16,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 03:38:16,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 03:38:16,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21af3a38 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 03:38:16,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:38:16" (1/1) ... [2022-02-15 03:38:16,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 03:38:16,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 03:38:16,417 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-1.c[328,341] [2022-02-15 03:38:16,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:38:16,443 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 03:38:16,451 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-1.c[328,341] [2022-02-15 03:38:16,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:38:16,478 INFO L208 MainTranslator]: Completed translation [2022-02-15 03:38:16,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:16 WrapperNode [2022-02-15 03:38:16,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 03:38:16,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 03:38:16,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 03:38:16,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 03:38:16,488 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 03:38:16,488 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 03:38:16,494 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 03:38:16,494 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 03:38:16,498 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 03:38:16,501 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 03:38:16,502 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 03:38:16,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 03:38:16,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 03:38:16,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 03:38:16,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 03:38:16,508 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 03:38:16,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:38:16,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 03:38:16,538 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 03:38:16,543 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 03:38:16,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 03:38:16,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 03:38:16,564 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 03:38:16,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 03:38:16,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 03:38:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 03:38:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 03:38:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 03:38:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 03:38:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 03:38:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 03:38:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 03:38:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 03:38:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 03:38:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 03:38:16,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 03:38:16,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 03:38:16,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 03:38:16,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 03:38:16,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 03:38:16,614 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 03:38:16,615 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 03:38:16,756 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 03:38:16,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 03:38:16,760 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-15 03:38:16,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:38:16 BoogieIcfgContainer [2022-02-15 03:38:16,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 03:38:16,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 03:38:16,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 03:38:16,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 03:38:16,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 03:38:16" (1/3) ... [2022-02-15 03:38:16,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c5ccef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:38:16, skipping insertion in model container [2022-02-15 03:38:16,786 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 03:38:16,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c5ccef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:38:16, skipping insertion in model container [2022-02-15 03:38:16,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:38:16" (3/3) ... [2022-02-15 03:38:16,788 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2022-02-15 03:38:16,791 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 03:38:16,791 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 03:38:16,853 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 03:38:16,858 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 03:38:16,858 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 03:38:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 03:38:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 03:38:16,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:16,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:16,883 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:16,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:16,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1898607287, now seen corresponding path program 1 times [2022-02-15 03:38:16,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:16,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804694538] [2022-02-15 03:38:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:16,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:16,938 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:17,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:17,160 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 03:38:17,161 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:17,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804694538] [2022-02-15 03:38:17,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1804694538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:17,166 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:17,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 03:38:17,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228996419] [2022-02-15 03:38:17,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:17,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 03:38:17,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:17,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 03:38:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 03:38:17,202 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 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 03:38:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:17,405 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2022-02-15 03:38:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:38:17,406 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 03:38:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:17,411 INFO L225 Difference]: With dead ends: 67 [2022-02-15 03:38:17,411 INFO L226 Difference]: Without dead ends: 30 [2022-02-15 03:38:17,414 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 03:38:17,417 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:17,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 47 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-15 03:38:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-02-15 03:38:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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 03:38:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-02-15 03:38:17,456 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-02-15 03:38:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:17,457 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-02-15 03:38:17,457 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 03:38:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-02-15 03:38:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 03:38:17,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:17,458 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 03:38:17,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 03:38:17,459 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1409532089, now seen corresponding path program 1 times [2022-02-15 03:38:17,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:17,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906471302] [2022-02-15 03:38:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:17,474 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:17,476 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:17,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:17,612 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:17,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906471302] [2022-02-15 03:38:17,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [906471302] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:17,612 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:17,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:38:17,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516834584] [2022-02-15 03:38:17,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:17,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:38:17,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:17,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:38:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:38:17,614 INFO L87 Difference]: Start difference. First operand 29 states and 34 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 03:38:17,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:17,779 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-02-15 03:38:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:38:17,779 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 03:38:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:17,781 INFO L225 Difference]: With dead ends: 63 [2022-02-15 03:38:17,781 INFO L226 Difference]: Without dead ends: 40 [2022-02-15 03:38:17,784 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 03:38:17,785 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:17,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 48 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-15 03:38:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-02-15 03:38:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 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 03:38:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-02-15 03:38:17,801 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2022-02-15 03:38:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:17,802 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-02-15 03:38:17,802 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 03:38:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-02-15 03:38:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 03:38:17,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:17,804 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 03:38:17,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 03:38:17,804 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1068097608, now seen corresponding path program 1 times [2022-02-15 03:38:17,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:17,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89310812] [2022-02-15 03:38:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:17,815 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:17,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:17,818 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:18,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:18,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:18,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89310812] [2022-02-15 03:38:18,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [89310812] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:18,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:18,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:38:18,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84831731] [2022-02-15 03:38:18,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:18,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:38:18,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:18,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:38:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:38:18,323 INFO L87 Difference]: Start difference. First operand 32 states and 37 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 03:38:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:18,778 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-02-15 03:38:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:38:18,779 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 03:38:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:18,780 INFO L225 Difference]: With dead ends: 83 [2022-02-15 03:38:18,781 INFO L226 Difference]: Without dead ends: 64 [2022-02-15 03:38:18,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:38:18,782 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:18,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 61 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:38:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-15 03:38:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2022-02-15 03:38:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 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 03:38:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-02-15 03:38:18,793 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2022-02-15 03:38:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:18,793 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-02-15 03:38:18,793 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 03:38:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-02-15 03:38:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 03:38:18,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:18,794 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 03:38:18,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 03:38:18,794 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash -367033030, now seen corresponding path program 1 times [2022-02-15 03:38:18,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:18,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907129850] [2022-02-15 03:38:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:18,796 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:18,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:18,797 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:18,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:18,852 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 03:38:18,852 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:18,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907129850] [2022-02-15 03:38:18,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907129850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:18,852 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:18,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 03:38:18,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554527294] [2022-02-15 03:38:18,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:18,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 03:38:18,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 03:38:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 03:38:18,854 INFO L87 Difference]: Start difference. First operand 48 states and 57 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 03:38:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:18,927 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-02-15 03:38:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 03:38:18,927 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 03:38:18,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:18,929 INFO L225 Difference]: With dead ends: 92 [2022-02-15 03:38:18,929 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 03:38:18,929 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 03:38:18,930 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:18,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 32 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 03:38:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 03:38:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-02-15 03:38:18,939 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 03:38:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-02-15 03:38:18,940 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2022-02-15 03:38:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:18,940 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-02-15 03:38:18,940 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 03:38:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-02-15 03:38:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 03:38:18,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:18,941 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, 1, 1] [2022-02-15 03:38:18,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 03:38:18,941 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:18,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1586594931, now seen corresponding path program 1 times [2022-02-15 03:38:18,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:18,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538162802] [2022-02-15 03:38:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:18,943 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:18,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:18,944 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:19,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:19,269 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 03:38:19,269 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:19,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538162802] [2022-02-15 03:38:19,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [538162802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:19,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:19,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:38:19,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493393323] [2022-02-15 03:38:19,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:19,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:38:19,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:19,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:38:19,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:38:19,271 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:20,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:20,103 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2022-02-15 03:38:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:38:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 03:38:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:20,106 INFO L225 Difference]: With dead ends: 117 [2022-02-15 03:38:20,106 INFO L226 Difference]: Without dead ends: 82 [2022-02-15 03:38:20,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 03:38:20,110 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 109 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:20,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 96 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-15 03:38:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2022-02-15 03:38:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 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 03:38:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-02-15 03:38:20,136 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 30 [2022-02-15 03:38:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:20,136 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-02-15 03:38:20,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:20,137 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-02-15 03:38:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 03:38:20,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:20,137 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 03:38:20,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 03:38:20,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash 932991851, now seen corresponding path program 2 times [2022-02-15 03:38:20,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:20,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519972124] [2022-02-15 03:38:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:20,140 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:20,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:20,142 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:20,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:20,256 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 03:38:20,256 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:20,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519972124] [2022-02-15 03:38:20,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [519972124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:20,257 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:20,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:38:20,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614094488] [2022-02-15 03:38:20,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:20,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:38:20,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:20,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:38:20,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:20,258 INFO L87 Difference]: Start difference. First operand 52 states and 60 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 03:38:20,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:20,451 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2022-02-15 03:38:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:38:20,451 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 03:38:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:20,452 INFO L225 Difference]: With dead ends: 102 [2022-02-15 03:38:20,453 INFO L226 Difference]: Without dead ends: 81 [2022-02-15 03:38:20,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:38:20,455 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 121 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:20,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 65 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-15 03:38:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2022-02-15 03:38:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 60 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 03:38:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2022-02-15 03:38:20,483 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 31 [2022-02-15 03:38:20,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:20,483 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2022-02-15 03:38:20,483 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 03:38:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2022-02-15 03:38:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 03:38:20,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:20,489 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 03:38:20,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 03:38:20,489 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash 912710034, now seen corresponding path program 1 times [2022-02-15 03:38:20,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:20,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723800790] [2022-02-15 03:38:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:20,491 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:20,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:20,492 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:20,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:20,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 03:38:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:20,649 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 03:38:20,650 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:20,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723800790] [2022-02-15 03:38:20,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [723800790] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:20,650 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:20,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:38:20,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346930696] [2022-02-15 03:38:20,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:20,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:38:20,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:20,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:38:20,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:20,651 INFO L87 Difference]: Start difference. First operand 67 states and 77 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 03:38:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:20,933 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2022-02-15 03:38:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:38:20,933 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 03:38:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:20,935 INFO L225 Difference]: With dead ends: 90 [2022-02-15 03:38:20,935 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 03:38:20,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:38:20,937 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:20,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 64 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:38:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 03:38:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2022-02-15 03:38:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 3 states have call successors, (3), 3 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 03:38:20,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-02-15 03:38:20,949 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2022-02-15 03:38:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:20,950 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-02-15 03:38:20,950 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 03:38:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-02-15 03:38:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 03:38:20,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:20,950 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 03:38:20,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 03:38:20,950 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1010087575, now seen corresponding path program 3 times [2022-02-15 03:38:20,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:20,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513879677] [2022-02-15 03:38:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:20,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:20,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:20,955 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:21,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:21,345 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 03:38:21,346 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:21,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513879677] [2022-02-15 03:38:21,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [513879677] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:21,346 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:21,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:38:21,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589175230] [2022-02-15 03:38:21,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:21,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:38:21,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:21,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:38:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:38:21,348 INFO L87 Difference]: Start difference. First operand 47 states and 54 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 03:38:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:21,876 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2022-02-15 03:38:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 03:38:21,877 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 03:38:21,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:21,878 INFO L225 Difference]: With dead ends: 120 [2022-02-15 03:38:21,878 INFO L226 Difference]: Without dead ends: 99 [2022-02-15 03:38:21,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 03:38:21,880 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 162 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:21,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 68 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:38:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-15 03:38:21,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2022-02-15 03:38:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2) internal successors, (66), 56 states have internal predecessors, (66), 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 03:38:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-02-15 03:38:21,901 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 33 [2022-02-15 03:38:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:21,901 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-02-15 03:38:21,902 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 03:38:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-02-15 03:38:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 03:38:21,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:21,902 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, 1, 1] [2022-02-15 03:38:21,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 03:38:21,903 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash 925785056, now seen corresponding path program 1 times [2022-02-15 03:38:21,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:21,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50556609] [2022-02-15 03:38:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:21,905 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:21,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:21,906 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:22,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:22,155 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:22,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50556609] [2022-02-15 03:38:22,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [50556609] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:22,156 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:22,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:38:22,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654124144] [2022-02-15 03:38:22,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:22,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:38:22,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:22,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:38:22,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:38:22,157 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:22,942 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2022-02-15 03:38:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 03:38:22,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 03:38:22,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:22,944 INFO L225 Difference]: With dead ends: 164 [2022-02-15 03:38:22,944 INFO L226 Difference]: Without dead ends: 143 [2022-02-15 03:38:22,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=1733, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 03:38:22,946 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 209 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:22,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 56 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-15 03:38:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 71. [2022-02-15 03:38:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 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 03:38:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-02-15 03:38:22,972 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 38 [2022-02-15 03:38:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:22,973 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-02-15 03:38:22,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-02-15 03:38:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 03:38:22,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:22,974 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, 1, 1] [2022-02-15 03:38:22,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 03:38:22,974 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash 909842600, now seen corresponding path program 2 times [2022-02-15 03:38:22,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:22,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338853341] [2022-02-15 03:38:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:22,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:22,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:22,978 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:23,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:23,437 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 03:38:23,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:23,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338853341] [2022-02-15 03:38:23,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1338853341] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:23,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:23,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:38:23,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423636609] [2022-02-15 03:38:23,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:23,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:38:23,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:23,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:38:23,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:38:23,438 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:24,515 INFO L93 Difference]: Finished difference Result 202 states and 264 transitions. [2022-02-15 03:38:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 03:38:24,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 03:38:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:24,516 INFO L225 Difference]: With dead ends: 202 [2022-02-15 03:38:24,516 INFO L226 Difference]: Without dead ends: 166 [2022-02-15 03:38:24,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=2268, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 03:38:24,518 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 152 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:24,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 80 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-02-15 03:38:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 111. [2022-02-15 03:38:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 104 states have internal predecessors, (135), 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 03:38:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 142 transitions. [2022-02-15 03:38:24,545 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 142 transitions. Word has length 38 [2022-02-15 03:38:24,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:24,545 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 142 transitions. [2022-02-15 03:38:24,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 142 transitions. [2022-02-15 03:38:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 03:38:24,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:24,546 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 03:38:24,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 03:38:24,546 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:24,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:24,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2114079652, now seen corresponding path program 4 times [2022-02-15 03:38:24,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:24,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381560736] [2022-02-15 03:38:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:24,548 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:24,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:24,549 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:24,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:24,737 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:24,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381560736] [2022-02-15 03:38:24,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381560736] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:24,738 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:24,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:38:24,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537941266] [2022-02-15 03:38:24,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:24,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:38:24,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:24,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:38:24,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:38:24,739 INFO L87 Difference]: Start difference. First operand 111 states and 142 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 03:38:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:25,345 INFO L93 Difference]: Finished difference Result 290 states and 379 transitions. [2022-02-15 03:38:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:38:25,345 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 03:38:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:25,347 INFO L225 Difference]: With dead ends: 290 [2022-02-15 03:38:25,347 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 03:38:25,347 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 03:38:25,348 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 194 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:25,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 84 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 03:38:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 148. [2022-02-15 03:38:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 140 states have (on average 1.292857142857143) internal successors, (181), 141 states have internal predecessors, (181), 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 03:38:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2022-02-15 03:38:25,395 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 39 [2022-02-15 03:38:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:25,395 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2022-02-15 03:38:25,395 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 03:38:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2022-02-15 03:38:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 03:38:25,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:25,396 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 03:38:25,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 03:38:25,396 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1844691523, now seen corresponding path program 2 times [2022-02-15 03:38:25,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:25,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26251447] [2022-02-15 03:38:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:25,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:25,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:25,399 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:25,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:25,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 03:38:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:25,561 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 03:38:25,561 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:25,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26251447] [2022-02-15 03:38:25,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [26251447] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:25,561 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:25,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:38:25,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698357525] [2022-02-15 03:38:25,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:25,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:38:25,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:25,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:38:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:38:25,563 INFO L87 Difference]: Start difference. First operand 148 states and 188 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 03:38:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:26,144 INFO L93 Difference]: Finished difference Result 207 states and 264 transitions. [2022-02-15 03:38:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:38:26,145 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 03:38:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:26,146 INFO L225 Difference]: With dead ends: 207 [2022-02-15 03:38:26,146 INFO L226 Difference]: Without dead ends: 205 [2022-02-15 03:38:26,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:38:26,147 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:26,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 92 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:26,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-15 03:38:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 171. [2022-02-15 03:38:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 160 states have (on average 1.26875) internal successors, (203), 162 states have internal predecessors, (203), 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 03:38:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 214 transitions. [2022-02-15 03:38:26,213 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 214 transitions. Word has length 41 [2022-02-15 03:38:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:26,214 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 214 transitions. [2022-02-15 03:38:26,214 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 03:38:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 214 transitions. [2022-02-15 03:38:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 03:38:26,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:26,215 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 03:38:26,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 03:38:26,215 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:26,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1706177446, now seen corresponding path program 5 times [2022-02-15 03:38:26,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:26,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846885506] [2022-02-15 03:38:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:26,217 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:26,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:26,218 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:26,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:26,704 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 03:38:26,704 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:26,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846885506] [2022-02-15 03:38:26,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [846885506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:26,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:26,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:38:26,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326204413] [2022-02-15 03:38:26,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:26,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:38:26,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:26,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:38:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:38:26,706 INFO L87 Difference]: Start difference. First operand 171 states and 214 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 03:38:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:27,529 INFO L93 Difference]: Finished difference Result 251 states and 315 transitions. [2022-02-15 03:38:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 03:38:27,529 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 03:38:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:27,532 INFO L225 Difference]: With dead ends: 251 [2022-02-15 03:38:27,532 INFO L226 Difference]: Without dead ends: 249 [2022-02-15 03:38:27,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:38:27,535 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 206 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:27,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 73 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-15 03:38:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 196. [2022-02-15 03:38:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 183 states have (on average 1.2677595628415301) internal successors, (232), 186 states have internal predecessors, (232), 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 03:38:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 245 transitions. [2022-02-15 03:38:27,630 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 245 transitions. Word has length 41 [2022-02-15 03:38:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:27,631 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 245 transitions. [2022-02-15 03:38:27,631 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 03:38:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 245 transitions. [2022-02-15 03:38:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 03:38:27,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:27,632 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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 03:38:27,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 03:38:27,632 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash -336118839, now seen corresponding path program 2 times [2022-02-15 03:38:27,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:27,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986303054] [2022-02-15 03:38:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:27,635 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:27,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:27,636 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:27,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:27,697 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:27,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986303054] [2022-02-15 03:38:27,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1986303054] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:27,697 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:27,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:38:27,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377519434] [2022-02-15 03:38:27,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:27,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:38:27,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:27,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:38:27,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:27,698 INFO L87 Difference]: Start difference. First operand 196 states and 245 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 03:38:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:28,051 INFO L93 Difference]: Finished difference Result 291 states and 370 transitions. [2022-02-15 03:38:28,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:38:28,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 43 [2022-02-15 03:38:28,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:28,052 INFO L225 Difference]: With dead ends: 291 [2022-02-15 03:38:28,052 INFO L226 Difference]: Without dead ends: 216 [2022-02-15 03:38:28,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:38:28,053 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 106 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:28,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 56 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-15 03:38:28,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 169. [2022-02-15 03:38:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 156 states have (on average 1.205128205128205) internal successors, (188), 159 states have internal predecessors, (188), 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 03:38:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 201 transitions. [2022-02-15 03:38:28,107 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 201 transitions. Word has length 43 [2022-02-15 03:38:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:28,107 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 201 transitions. [2022-02-15 03:38:28,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 03:38:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 201 transitions. [2022-02-15 03:38:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 03:38:28,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:28,108 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2022-02-15 03:38:28,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 03:38:28,108 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash 364945739, now seen corresponding path program 3 times [2022-02-15 03:38:28,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:28,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538127802] [2022-02-15 03:38:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:28,110 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:28,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:28,111 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:28,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:28,440 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 03:38:28,440 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:28,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538127802] [2022-02-15 03:38:28,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [538127802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:28,440 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:28,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 03:38:28,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294625431] [2022-02-15 03:38:28,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:28,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 03:38:28,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 03:38:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:38:28,441 INFO L87 Difference]: Start difference. First operand 169 states and 201 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:29,453 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2022-02-15 03:38:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 03:38:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-15 03:38:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:29,471 INFO L225 Difference]: With dead ends: 245 [2022-02-15 03:38:29,471 INFO L226 Difference]: Without dead ends: 243 [2022-02-15 03:38:29,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=2361, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 03:38:29,488 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 164 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:29,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 101 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-15 03:38:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 132. [2022-02-15 03:38:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 123 states have internal predecessors, (146), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 03:38:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2022-02-15 03:38:29,608 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 43 [2022-02-15 03:38:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:29,608 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2022-02-15 03:38:29,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2022-02-15 03:38:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 03:38:29,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:29,609 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, 1, 1] [2022-02-15 03:38:29,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 03:38:29,609 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:29,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1980469830, now seen corresponding path program 1 times [2022-02-15 03:38:29,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:29,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61473622] [2022-02-15 03:38:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:29,612 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:29,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:29,613 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:29,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:29,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 03:38:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:29,836 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 03:38:29,836 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:29,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61473622] [2022-02-15 03:38:29,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [61473622] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:29,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:29,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:38:29,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507267239] [2022-02-15 03:38:29,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:29,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:38:29,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:38:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:38:29,837 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 03:38:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:30,593 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2022-02-15 03:38:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 03:38:30,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 46 [2022-02-15 03:38:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:30,595 INFO L225 Difference]: With dead ends: 172 [2022-02-15 03:38:30,595 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 03:38:30,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 03:38:30,596 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 116 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:30,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 103 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:30,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 03:38:30,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2022-02-15 03:38:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 138 states have (on average 1.181159420289855) internal successors, (163), 140 states have internal predecessors, (163), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2022-02-15 03:38:30,655 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 46 [2022-02-15 03:38:30,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:30,655 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2022-02-15 03:38:30,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 03:38:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2022-02-15 03:38:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 03:38:30,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:30,656 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, 1, 1] [2022-02-15 03:38:30,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 03:38:30,656 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:30,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:30,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1825765489, now seen corresponding path program 3 times [2022-02-15 03:38:30,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:30,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819388414] [2022-02-15 03:38:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:30,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:30,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:30,658 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:30,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:30,693 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 03:38:30,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:30,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819388414] [2022-02-15 03:38:30,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819388414] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:30,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:30,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:38:30,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626246988] [2022-02-15 03:38:30,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:30,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:38:30,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:30,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:38:30,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:38:30,694 INFO L87 Difference]: Start difference. First operand 151 states and 176 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:30,853 INFO L93 Difference]: Finished difference Result 195 states and 232 transitions. [2022-02-15 03:38:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:38:30,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-15 03:38:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:30,854 INFO L225 Difference]: With dead ends: 195 [2022-02-15 03:38:30,854 INFO L226 Difference]: Without dead ends: 167 [2022-02-15 03:38:30,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:38:30,855 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:30,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 67 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:30,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-15 03:38:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2022-02-15 03:38:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 142 states have (on average 1.1901408450704225) internal successors, (169), 144 states have internal predecessors, (169), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2022-02-15 03:38:30,909 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 46 [2022-02-15 03:38:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:30,909 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2022-02-15 03:38:30,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2022-02-15 03:38:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 03:38:30,910 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:30,910 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, 1, 1] [2022-02-15 03:38:30,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 03:38:30,910 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:30,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:30,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1458084557, now seen corresponding path program 1 times [2022-02-15 03:38:30,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:30,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560460784] [2022-02-15 03:38:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:30,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:30,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:30,912 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:31,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:31,324 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 03:38:31,324 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:31,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560460784] [2022-02-15 03:38:31,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [560460784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:31,324 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:31,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:38:31,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137193801] [2022-02-15 03:38:31,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:31,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:38:31,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:31,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:38:31,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:38:31,326 INFO L87 Difference]: Start difference. First operand 155 states and 182 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 03:38:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:32,088 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2022-02-15 03:38:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:38:32,089 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 46 [2022-02-15 03:38:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:32,091 INFO L225 Difference]: With dead ends: 255 [2022-02-15 03:38:32,091 INFO L226 Difference]: Without dead ends: 253 [2022-02-15 03:38:32,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:38:32,092 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 141 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:32,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 87 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-15 03:38:32,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 179. [2022-02-15 03:38:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 166 states have (on average 1.216867469879518) internal successors, (202), 168 states have internal predecessors, (202), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2022-02-15 03:38:32,238 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 46 [2022-02-15 03:38:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:32,239 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2022-02-15 03:38:32,239 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 03:38:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2022-02-15 03:38:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 03:38:32,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:32,239 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, 1, 1] [2022-02-15 03:38:32,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 03:38:32,239 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash -253360043, now seen corresponding path program 4 times [2022-02-15 03:38:32,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:32,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296808775] [2022-02-15 03:38:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:32,241 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:32,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:32,242 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:32,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:32,806 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 03:38:32,806 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:32,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296808775] [2022-02-15 03:38:32,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296808775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:32,806 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:32,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:38:32,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941327562] [2022-02-15 03:38:32,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:32,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:38:32,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:38:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:38:32,808 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand has 26 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:34,498 INFO L93 Difference]: Finished difference Result 283 states and 341 transitions. [2022-02-15 03:38:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 03:38:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-15 03:38:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:34,503 INFO L225 Difference]: With dead ends: 283 [2022-02-15 03:38:34,503 INFO L226 Difference]: Without dead ends: 281 [2022-02-15 03:38:34,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=718, Invalid=2942, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 03:38:34,507 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 319 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:34,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 91 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:38:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-15 03:38:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 199. [2022-02-15 03:38:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 184 states have (on average 1.2173913043478262) internal successors, (224), 187 states have internal predecessors, (224), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 03:38:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 239 transitions. [2022-02-15 03:38:34,621 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 239 transitions. Word has length 46 [2022-02-15 03:38:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:34,621 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 239 transitions. [2022-02-15 03:38:34,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 239 transitions. [2022-02-15 03:38:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 03:38:34,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:34,632 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:34,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 03:38:34,633 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1841707945, now seen corresponding path program 4 times [2022-02-15 03:38:34,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:34,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546118553] [2022-02-15 03:38:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:34,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:34,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:34,660 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:34,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:34,721 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 03:38:34,721 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:34,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546118553] [2022-02-15 03:38:34,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1546118553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:34,721 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:34,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:38:34,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723574745] [2022-02-15 03:38:34,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:34,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:38:34,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:34,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:38:34,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:38:34,722 INFO L87 Difference]: Start difference. First operand 199 states and 239 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, (3), 3 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 03:38:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:35,059 INFO L93 Difference]: Finished difference Result 323 states and 394 transitions. [2022-02-15 03:38:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:38:35,059 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-15 03:38:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:35,061 INFO L225 Difference]: With dead ends: 323 [2022-02-15 03:38:35,061 INFO L226 Difference]: Without dead ends: 216 [2022-02-15 03:38:35,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 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 03:38:35,064 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 121 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:35,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 53 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-15 03:38:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 154. [2022-02-15 03:38:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 144 states have (on average 1.1736111111111112) internal successors, (169), 145 states have internal predecessors, (169), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 03:38:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 178 transitions. [2022-02-15 03:38:35,130 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 178 transitions. Word has length 46 [2022-02-15 03:38:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:35,131 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 178 transitions. [2022-02-15 03:38:35,131 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, (3), 3 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 03:38:35,131 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 178 transitions. [2022-02-15 03:38:35,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 03:38:35,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:35,131 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 03:38:35,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 03:38:35,131 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash -966082275, now seen corresponding path program 3 times [2022-02-15 03:38:35,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:35,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778120105] [2022-02-15 03:38:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:35,133 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:35,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:35,133 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 03:38:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 03:38:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,232 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 03:38:35,232 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:35,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778120105] [2022-02-15 03:38:35,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [778120105] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:35,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:35,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:38:35,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081030759] [2022-02-15 03:38:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:35,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:38:35,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:35,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:38:35,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:38:35,233 INFO L87 Difference]: Start difference. First operand 154 states and 178 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 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 03:38:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:35,645 INFO L93 Difference]: Finished difference Result 213 states and 249 transitions. [2022-02-15 03:38:35,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:38:35,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 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 03:38:35,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:35,650 INFO L225 Difference]: With dead ends: 213 [2022-02-15 03:38:35,651 INFO L226 Difference]: Without dead ends: 186 [2022-02-15 03:38:35,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:38:35,652 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 153 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:35,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 79 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:38:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-15 03:38:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2022-02-15 03:38:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 141 states have internal predecessors, (160), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 03:38:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2022-02-15 03:38:35,723 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 49 [2022-02-15 03:38:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:35,723 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2022-02-15 03:38:35,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 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 03:38:35,723 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2022-02-15 03:38:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 03:38:35,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:35,724 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 03:38:35,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 03:38:35,724 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:35,724 INFO L85 PathProgramCache]: Analyzing trace with hash -146750412, now seen corresponding path program 4 times [2022-02-15 03:38:35,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:35,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650431494] [2022-02-15 03:38:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:35,726 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:35,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:35,727 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 03:38:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,975 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 03:38:35,975 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:35,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650431494] [2022-02-15 03:38:35,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650431494] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:35,975 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:35,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:38:35,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608441039] [2022-02-15 03:38:35,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:35,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:38:35,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:35,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:38:35,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:38:35,976 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 03:38:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:36,751 INFO L93 Difference]: Finished difference Result 197 states and 228 transitions. [2022-02-15 03:38:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 03:38:36,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 03:38:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:36,753 INFO L225 Difference]: With dead ends: 197 [2022-02-15 03:38:36,753 INFO L226 Difference]: Without dead ends: 195 [2022-02-15 03:38:36,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:38:36,754 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:36,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 94 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-15 03:38:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 175. [2022-02-15 03:38:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 162 states have (on average 1.154320987654321) internal successors, (187), 165 states have internal predecessors, (187), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2022-02-15 03:38:36,840 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 49 [2022-02-15 03:38:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:36,840 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2022-02-15 03:38:36,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 03:38:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2022-02-15 03:38:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:38:36,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:36,841 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:36,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 03:38:36,841 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:36,841 INFO L85 PathProgramCache]: Analyzing trace with hash 554440741, now seen corresponding path program 1 times [2022-02-15 03:38:36,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:36,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982052347] [2022-02-15 03:38:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:36,842 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:36,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:36,843 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 03:38:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,486 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 03:38:37,486 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:37,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982052347] [2022-02-15 03:38:37,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [982052347] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:37,486 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:37,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:38:37,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845947072] [2022-02-15 03:38:37,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:37,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:38:37,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:38:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:38:37,487 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 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 03:38:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:38,691 INFO L93 Difference]: Finished difference Result 241 states and 274 transitions. [2022-02-15 03:38:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 03:38:38,692 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 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 51 [2022-02-15 03:38:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:38,693 INFO L225 Difference]: With dead ends: 241 [2022-02-15 03:38:38,693 INFO L226 Difference]: Without dead ends: 209 [2022-02-15 03:38:38,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=461, Invalid=2845, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 03:38:38,694 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 161 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:38,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 70 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:38,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-15 03:38:38,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 188. [2022-02-15 03:38:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 175 states have (on average 1.1428571428571428) internal successors, (200), 178 states have internal predecessors, (200), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2022-02-15 03:38:38,776 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 51 [2022-02-15 03:38:38,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:38,776 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2022-02-15 03:38:38,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 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 03:38:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2022-02-15 03:38:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:38:38,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:38,777 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:38,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 03:38:38,777 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash 455716478, now seen corresponding path program 1 times [2022-02-15 03:38:38,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:38,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968275721] [2022-02-15 03:38:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:38,779 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:38,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:38,780 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:38,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:38,846 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:38,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968275721] [2022-02-15 03:38:38,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [968275721] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:38,847 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:38,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:38:38,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455386216] [2022-02-15 03:38:38,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:38,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:38:38,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:38:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:38:38,847 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 03:38:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:39,118 INFO L93 Difference]: Finished difference Result 257 states and 298 transitions. [2022-02-15 03:38:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:38:39,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 51 [2022-02-15 03:38:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:39,120 INFO L225 Difference]: With dead ends: 257 [2022-02-15 03:38:39,120 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 03:38:39,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:38:39,121 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:39,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 59 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 03:38:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 188. [2022-02-15 03:38:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 175 states have (on average 1.1371428571428572) internal successors, (199), 178 states have internal predecessors, (199), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 213 transitions. [2022-02-15 03:38:39,206 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 213 transitions. Word has length 51 [2022-02-15 03:38:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:39,206 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 213 transitions. [2022-02-15 03:38:39,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 03:38:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 213 transitions. [2022-02-15 03:38:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:38:39,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:39,207 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:39,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 03:38:39,207 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:39,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1181899854, now seen corresponding path program 1 times [2022-02-15 03:38:39,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:39,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932477537] [2022-02-15 03:38:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:39,208 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:39,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:39,209 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:39,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:39,949 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:39,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932477537] [2022-02-15 03:38:39,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [932477537] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:39,949 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:39,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:38:39,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170829163] [2022-02-15 03:38:39,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:39,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:38:39,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:39,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:38:39,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:38:39,950 INFO L87 Difference]: Start difference. First operand 188 states and 213 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 03:38:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:41,239 INFO L93 Difference]: Finished difference Result 315 states and 367 transitions. [2022-02-15 03:38:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 03:38:41,240 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 51 [2022-02-15 03:38:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:41,241 INFO L225 Difference]: With dead ends: 315 [2022-02-15 03:38:41,241 INFO L226 Difference]: Without dead ends: 313 [2022-02-15 03:38:41,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=3010, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 03:38:41,242 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 218 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:41,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 74 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-15 03:38:41,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 219. [2022-02-15 03:38:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 206 states have (on average 1.1650485436893203) internal successors, (240), 209 states have internal predecessors, (240), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 03:38:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 254 transitions. [2022-02-15 03:38:41,375 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 254 transitions. Word has length 51 [2022-02-15 03:38:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:41,376 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 254 transitions. [2022-02-15 03:38:41,376 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 03:38:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 254 transitions. [2022-02-15 03:38:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:38:41,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:41,377 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2022-02-15 03:38:41,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 03:38:41,377 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash -186725060, now seen corresponding path program 5 times [2022-02-15 03:38:41,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:41,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605596324] [2022-02-15 03:38:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:41,379 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:41,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:41,380 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:41,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:41,958 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 03:38:41,958 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:41,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605596324] [2022-02-15 03:38:41,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [605596324] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:41,958 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:41,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:38:41,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570832565] [2022-02-15 03:38:41,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:41,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:38:41,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:41,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:38:41,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:38:41,960 INFO L87 Difference]: Start difference. First operand 219 states and 254 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 03:38:43,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:43,228 INFO L93 Difference]: Finished difference Result 305 states and 355 transitions. [2022-02-15 03:38:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 03:38:43,228 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 51 [2022-02-15 03:38:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:43,230 INFO L225 Difference]: With dead ends: 305 [2022-02-15 03:38:43,230 INFO L226 Difference]: Without dead ends: 303 [2022-02-15 03:38:43,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=2867, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 03:38:43,231 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 198 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:43,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 59 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-15 03:38:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 229. [2022-02-15 03:38:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 215 states have (on average 1.1674418604651162) internal successors, (251), 218 states have internal predecessors, (251), 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 03:38:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 265 transitions. [2022-02-15 03:38:43,370 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 265 transitions. Word has length 51 [2022-02-15 03:38:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:43,370 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 265 transitions. [2022-02-15 03:38:43,370 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 03:38:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 265 transitions. [2022-02-15 03:38:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:38:43,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:43,371 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:43,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 03:38:43,371 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:43,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1824744982, now seen corresponding path program 2 times [2022-02-15 03:38:43,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:43,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44533410] [2022-02-15 03:38:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:43,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:43,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:43,374 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:43,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:43,854 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:43,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44533410] [2022-02-15 03:38:43,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [44533410] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:43,854 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:43,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:38:43,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984630452] [2022-02-15 03:38:43,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:43,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:38:43,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:43,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:38:43,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:38:43,855 INFO L87 Difference]: Start difference. First operand 229 states and 265 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 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 03:38:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:44,671 INFO L93 Difference]: Finished difference Result 268 states and 311 transitions. [2022-02-15 03:38:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 03:38:44,671 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-15 03:38:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:44,672 INFO L225 Difference]: With dead ends: 268 [2022-02-15 03:38:44,672 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 03:38:44,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=1791, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 03:38:44,673 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 114 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:44,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 91 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 03:38:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 232. [2022-02-15 03:38:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 218 states have (on average 1.1697247706422018) internal successors, (255), 221 states have internal predecessors, (255), 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 03:38:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 269 transitions. [2022-02-15 03:38:44,779 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 269 transitions. Word has length 51 [2022-02-15 03:38:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:44,779 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 269 transitions. [2022-02-15 03:38:44,779 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), 2 states have call successors, (3), 3 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 03:38:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 269 transitions. [2022-02-15 03:38:44,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 03:38:44,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:44,780 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, 1, 1] [2022-02-15 03:38:44,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 03:38:44,780 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash 636186535, now seen corresponding path program 1 times [2022-02-15 03:38:44,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:44,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074454431] [2022-02-15 03:38:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:44,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:44,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:44,783 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:45,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:45,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 03:38:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:45,040 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 03:38:45,040 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:45,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074454431] [2022-02-15 03:38:45,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1074454431] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:45,041 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:45,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:38:45,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990325702] [2022-02-15 03:38:45,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:45,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:38:45,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:38:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:38:45,042 INFO L87 Difference]: Start difference. First operand 232 states and 269 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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 03:38:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:46,131 INFO L93 Difference]: Finished difference Result 448 states and 537 transitions. [2022-02-15 03:38:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 03:38:46,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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 54 [2022-02-15 03:38:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:46,133 INFO L225 Difference]: With dead ends: 448 [2022-02-15 03:38:46,133 INFO L226 Difference]: Without dead ends: 360 [2022-02-15 03:38:46,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=2045, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 03:38:46,134 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 197 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:46,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 85 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:38:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-15 03:38:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 271. [2022-02-15 03:38:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 253 states have (on average 1.1699604743083003) internal successors, (296), 258 states have internal predecessors, (296), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-15 03:38:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 316 transitions. [2022-02-15 03:38:46,292 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 316 transitions. Word has length 54 [2022-02-15 03:38:46,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:46,292 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 316 transitions. [2022-02-15 03:38:46,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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 03:38:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 316 transitions. [2022-02-15 03:38:46,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 03:38:46,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:46,293 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, 1, 1] [2022-02-15 03:38:46,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 03:38:46,293 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1518785839, now seen corresponding path program 2 times [2022-02-15 03:38:46,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:46,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975376731] [2022-02-15 03:38:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:46,295 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:46,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:46,296 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:46,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:46,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 03:38:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:46,718 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 03:38:46,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:46,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975376731] [2022-02-15 03:38:46,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [975376731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:46,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:46,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:38:46,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113325255] [2022-02-15 03:38:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:46,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:38:46,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:46,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:38:46,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:38:46,719 INFO L87 Difference]: Start difference. First operand 271 states and 316 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 03:38:48,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:48,142 INFO L93 Difference]: Finished difference Result 337 states and 395 transitions. [2022-02-15 03:38:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 03:38:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 54 [2022-02-15 03:38:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:48,143 INFO L225 Difference]: With dead ends: 337 [2022-02-15 03:38:48,143 INFO L226 Difference]: Without dead ends: 335 [2022-02-15 03:38:48,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=419, Invalid=2443, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 03:38:48,144 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 198 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:48,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 114 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:38:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-15 03:38:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 280. [2022-02-15 03:38:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 261 states have (on average 1.1724137931034482) internal successors, (306), 267 states have internal predecessors, (306), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-15 03:38:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 328 transitions. [2022-02-15 03:38:48,298 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 328 transitions. Word has length 54 [2022-02-15 03:38:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:48,298 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 328 transitions. [2022-02-15 03:38:48,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 03:38:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 328 transitions. [2022-02-15 03:38:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 03:38:48,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:48,299 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 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 03:38:48,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 03:38:48,299 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash -676055644, now seen corresponding path program 2 times [2022-02-15 03:38:48,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:48,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784866828] [2022-02-15 03:38:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:48,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:48,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:48,301 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:49,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:49,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-15 03:38:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:49,009 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:49,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784866828] [2022-02-15 03:38:49,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [784866828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:49,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:49,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 03:38:49,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391460242] [2022-02-15 03:38:49,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:49,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 03:38:49,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 03:38:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:38:49,011 INFO L87 Difference]: Start difference. First operand 280 states and 328 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 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 03:38:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:51,802 INFO L93 Difference]: Finished difference Result 345 states and 407 transitions. [2022-02-15 03:38:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 03:38:51,802 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 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 56 [2022-02-15 03:38:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:51,803 INFO L225 Difference]: With dead ends: 345 [2022-02-15 03:38:51,803 INFO L226 Difference]: Without dead ends: 299 [2022-02-15 03:38:51,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=821, Invalid=5185, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 03:38:51,805 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 179 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:51,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 118 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:38:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-15 03:38:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 227. [2022-02-15 03:38:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 216 states have internal predecessors, (253), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-15 03:38:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 272 transitions. [2022-02-15 03:38:51,972 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 272 transitions. Word has length 56 [2022-02-15 03:38:51,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:51,972 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 272 transitions. [2022-02-15 03:38:51,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 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 03:38:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 272 transitions. [2022-02-15 03:38:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 03:38:51,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:51,973 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 03:38:51,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 03:38:51,973 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:51,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1953283570, now seen corresponding path program 5 times [2022-02-15 03:38:51,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:51,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518157305] [2022-02-15 03:38:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:51,976 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:51,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:51,982 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:52,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:52,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 03:38:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:52,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 03:38:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:52,260 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 03:38:52,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:52,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518157305] [2022-02-15 03:38:52,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518157305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:52,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:52,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:38:52,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122263063] [2022-02-15 03:38:52,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:52,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:38:52,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:52,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:38:52,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:38:52,262 INFO L87 Difference]: Start difference. First operand 227 states and 272 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 03:38:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:52,949 INFO L93 Difference]: Finished difference Result 316 states and 380 transitions. [2022-02-15 03:38:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 03:38:52,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 03:38:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:52,952 INFO L225 Difference]: With dead ends: 316 [2022-02-15 03:38:52,952 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 03:38:52,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:38:52,954 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 163 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:52,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 96 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 03:38:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 265. [2022-02-15 03:38:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 241 states have (on average 1.1867219917012448) internal successors, (286), 249 states have internal predecessors, (286), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 03:38:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 319 transitions. [2022-02-15 03:38:53,129 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 319 transitions. Word has length 57 [2022-02-15 03:38:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:53,129 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 319 transitions. [2022-02-15 03:38:53,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 03:38:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 319 transitions. [2022-02-15 03:38:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 03:38:53,130 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:53,130 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:53,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 03:38:53,130 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:53,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1367177809, now seen corresponding path program 3 times [2022-02-15 03:38:53,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:53,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077243587] [2022-02-15 03:38:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:53,131 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:53,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:53,132 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:53,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:53,451 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 03:38:53,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:53,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077243587] [2022-02-15 03:38:53,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077243587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:53,455 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:53,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:38:53,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611404787] [2022-02-15 03:38:53,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:53,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:38:53,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:53,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:38:53,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:38:53,456 INFO L87 Difference]: Start difference. First operand 265 states and 319 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 03:38:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:54,612 INFO L93 Difference]: Finished difference Result 342 states and 414 transitions. [2022-02-15 03:38:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 03:38:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 56 [2022-02-15 03:38:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:54,614 INFO L225 Difference]: With dead ends: 342 [2022-02-15 03:38:54,614 INFO L226 Difference]: Without dead ends: 340 [2022-02-15 03:38:54,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=432, Invalid=2648, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 03:38:54,616 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 125 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:54,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 101 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-15 03:38:54,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 278. [2022-02-15 03:38:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 254 states have (on average 1.1929133858267718) internal successors, (303), 262 states have internal predecessors, (303), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 03:38:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 336 transitions. [2022-02-15 03:38:54,823 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 336 transitions. Word has length 56 [2022-02-15 03:38:54,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:54,823 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 336 transitions. [2022-02-15 03:38:54,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 03:38:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 336 transitions. [2022-02-15 03:38:54,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 03:38:54,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:54,825 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:54,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 03:38:54,825 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1889457963, now seen corresponding path program 4 times [2022-02-15 03:38:54,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:54,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137285946] [2022-02-15 03:38:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:54,840 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:54,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:54,847 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:55,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:55,421 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 03:38:55,421 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:55,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137285946] [2022-02-15 03:38:55,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2137285946] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:55,421 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:55,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:38:55,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123407112] [2022-02-15 03:38:55,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:55,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:38:55,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:55,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:38:55,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:38:55,422 INFO L87 Difference]: Start difference. First operand 278 states and 336 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 03:38:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:56,913 INFO L93 Difference]: Finished difference Result 327 states and 395 transitions. [2022-02-15 03:38:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 03:38:56,913 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 56 [2022-02-15 03:38:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:56,914 INFO L225 Difference]: With dead ends: 327 [2022-02-15 03:38:56,914 INFO L226 Difference]: Without dead ends: 325 [2022-02-15 03:38:56,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=442, Invalid=2210, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 03:38:56,915 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 166 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:56,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 82 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:38:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-15 03:38:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 282. [2022-02-15 03:38:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 257 states have (on average 1.1906614785992218) internal successors, (306), 265 states have internal predecessors, (306), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 03:38:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 339 transitions. [2022-02-15 03:38:57,085 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 339 transitions. Word has length 56 [2022-02-15 03:38:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:57,085 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 339 transitions. [2022-02-15 03:38:57,085 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 03:38:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 339 transitions. [2022-02-15 03:38:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 03:38:57,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:57,089 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:57,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 03:38:57,089 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash 997874079, now seen corresponding path program 2 times [2022-02-15 03:38:57,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:57,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837983463] [2022-02-15 03:38:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:57,091 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:57,092 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:57,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:57,229 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:57,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837983463] [2022-02-15 03:38:57,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837983463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:57,229 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:57,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:38:57,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574591226] [2022-02-15 03:38:57,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:57,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:38:57,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:57,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:38:57,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:38:57,230 INFO L87 Difference]: Start difference. First operand 282 states and 339 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 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 03:38:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:57,968 INFO L93 Difference]: Finished difference Result 644 states and 780 transitions. [2022-02-15 03:38:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:38:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-15 03:38:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:57,970 INFO L225 Difference]: With dead ends: 644 [2022-02-15 03:38:57,970 INFO L226 Difference]: Without dead ends: 503 [2022-02-15 03:38:57,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:38:57,971 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 244 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:57,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 97 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:38:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-02-15 03:38:58,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 369. [2022-02-15 03:38:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 344 states have (on average 1.1715116279069768) internal successors, (403), 352 states have internal predecessors, (403), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 03:38:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 436 transitions. [2022-02-15 03:38:58,216 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 436 transitions. Word has length 57 [2022-02-15 03:38:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:58,217 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 436 transitions. [2022-02-15 03:38:58,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 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 03:38:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 436 transitions. [2022-02-15 03:38:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 03:38:58,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:58,218 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 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, 1, 1] [2022-02-15 03:38:58,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 03:38:58,218 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash 358973142, now seen corresponding path program 1 times [2022-02-15 03:38:58,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:58,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430287064] [2022-02-15 03:38:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:58,219 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:58,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:58,220 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:58,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:58,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-15 03:38:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:58,517 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 03:38:58,517 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:58,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430287064] [2022-02-15 03:38:58,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [430287064] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:58,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:58,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:38:58,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605287482] [2022-02-15 03:38:58,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:58,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:38:58,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:38:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:38:58,518 INFO L87 Difference]: Start difference. First operand 369 states and 436 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 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 03:38:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:59,986 INFO L93 Difference]: Finished difference Result 458 states and 542 transitions. [2022-02-15 03:38:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 03:38:59,986 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), 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 59 [2022-02-15 03:38:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:59,988 INFO L225 Difference]: With dead ends: 458 [2022-02-15 03:38:59,988 INFO L226 Difference]: Without dead ends: 456 [2022-02-15 03:38:59,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=505, Invalid=3401, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 03:38:59,989 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 249 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:59,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 106 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:38:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-02-15 03:39:00,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 370. [2022-02-15 03:39:00,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 345 states have (on average 1.1710144927536232) internal successors, (404), 353 states have internal predecessors, (404), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 03:39:00,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 437 transitions. [2022-02-15 03:39:00,221 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 437 transitions. Word has length 59 [2022-02-15 03:39:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:00,221 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 437 transitions. [2022-02-15 03:39:00,221 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), 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 03:39:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 437 transitions. [2022-02-15 03:39:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 03:39:00,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:00,222 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 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 03:39:00,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 03:39:00,222 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash 356238102, now seen corresponding path program 3 times [2022-02-15 03:39:00,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:00,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948945188] [2022-02-15 03:39:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:00,223 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:00,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:00,225 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:00,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:00,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-15 03:39:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:00,993 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 03:39:00,993 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:00,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948945188] [2022-02-15 03:39:00,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1948945188] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:00,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:00,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 03:39:00,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152572611] [2022-02-15 03:39:00,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:00,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 03:39:00,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:00,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 03:39:00,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:39:00,994 INFO L87 Difference]: Start difference. First operand 370 states and 437 transitions. Second operand has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 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 03:39:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:03,397 INFO L93 Difference]: Finished difference Result 481 states and 564 transitions. [2022-02-15 03:39:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 03:39:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 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 59 [2022-02-15 03:39:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:03,399 INFO L225 Difference]: With dead ends: 481 [2022-02-15 03:39:03,399 INFO L226 Difference]: Without dead ends: 479 [2022-02-15 03:39:03,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=759, Invalid=5247, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 03:39:03,401 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 164 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:03,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 113 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:39:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-02-15 03:39:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 419. [2022-02-15 03:39:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 393 states have (on average 1.1653944020356235) internal successors, (458), 401 states have internal predecessors, (458), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (17), 9 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 03:39:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 493 transitions. [2022-02-15 03:39:03,718 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 493 transitions. Word has length 59 [2022-02-15 03:39:03,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:03,718 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 493 transitions. [2022-02-15 03:39:03,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 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 03:39:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 493 transitions. [2022-02-15 03:39:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 03:39:03,720 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:03,720 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:03,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 03:39:03,720 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1033874973, now seen corresponding path program 3 times [2022-02-15 03:39:03,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:03,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427797687] [2022-02-15 03:39:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:03,721 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:03,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:03,723 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:04,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:04,127 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 03:39:04,127 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:04,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427797687] [2022-02-15 03:39:04,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427797687] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:04,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:04,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:39:04,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714648817] [2022-02-15 03:39:04,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:04,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:39:04,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:39:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:39:04,131 INFO L87 Difference]: Start difference. First operand 419 states and 493 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 03:39:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:06,134 INFO L93 Difference]: Finished difference Result 584 states and 693 transitions. [2022-02-15 03:39:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 03:39:06,135 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 59 [2022-02-15 03:39:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:06,137 INFO L225 Difference]: With dead ends: 584 [2022-02-15 03:39:06,137 INFO L226 Difference]: Without dead ends: 582 [2022-02-15 03:39:06,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=720, Invalid=3440, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 03:39:06,138 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 242 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:06,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 81 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:39:06,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-02-15 03:39:06,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 483. [2022-02-15 03:39:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 455 states have (on average 1.1758241758241759) internal successors, (535), 464 states have internal predecessors, (535), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-15 03:39:06,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 572 transitions. [2022-02-15 03:39:06,495 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 572 transitions. Word has length 59 [2022-02-15 03:39:06,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:06,496 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 572 transitions. [2022-02-15 03:39:06,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 03:39:06,496 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 572 transitions. [2022-02-15 03:39:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 03:39:06,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:06,497 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:06,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 03:39:06,497 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:06,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1495218077, now seen corresponding path program 4 times [2022-02-15 03:39:06,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:06,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990316126] [2022-02-15 03:39:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:06,498 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:06,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:06,499 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:07,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:07,236 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 03:39:07,237 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:07,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990316126] [2022-02-15 03:39:07,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [990316126] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:07,237 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:07,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:39:07,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320354480] [2022-02-15 03:39:07,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:07,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:39:07,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:39:07,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:39:07,238 INFO L87 Difference]: Start difference. First operand 483 states and 572 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 03:39:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:09,084 INFO L93 Difference]: Finished difference Result 597 states and 710 transitions. [2022-02-15 03:39:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 03:39:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 59 [2022-02-15 03:39:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:09,086 INFO L225 Difference]: With dead ends: 597 [2022-02-15 03:39:09,086 INFO L226 Difference]: Without dead ends: 595 [2022-02-15 03:39:09,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=582, Invalid=3078, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 03:39:09,087 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 359 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:09,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 78 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-15 03:39:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 489. [2022-02-15 03:39:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 462 states have (on average 1.1818181818181819) internal successors, (546), 470 states have internal predecessors, (546), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (17), 9 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 03:39:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 581 transitions. [2022-02-15 03:39:09,394 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 581 transitions. Word has length 59 [2022-02-15 03:39:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:09,395 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 581 transitions. [2022-02-15 03:39:09,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 03:39:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 581 transitions. [2022-02-15 03:39:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 03:39:09,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:09,396 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2022-02-15 03:39:09,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 03:39:09,396 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash -989126035, now seen corresponding path program 6 times [2022-02-15 03:39:09,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:09,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694081692] [2022-02-15 03:39:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:09,397 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:09,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:09,398 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,098 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 03:39:10,098 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:10,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694081692] [2022-02-15 03:39:10,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694081692] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:10,098 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:10,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:39:10,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491091217] [2022-02-15 03:39:10,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:10,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:39:10,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:10,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:39:10,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:39:10,099 INFO L87 Difference]: Start difference. First operand 489 states and 581 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 03:39:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:12,206 INFO L93 Difference]: Finished difference Result 722 states and 862 transitions. [2022-02-15 03:39:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 03:39:12,206 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 59 [2022-02-15 03:39:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:12,209 INFO L225 Difference]: With dead ends: 722 [2022-02-15 03:39:12,209 INFO L226 Difference]: Without dead ends: 720 [2022-02-15 03:39:12,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=625, Invalid=4345, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 03:39:12,210 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 269 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:12,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 107 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:39:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-02-15 03:39:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 481. [2022-02-15 03:39:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 456 states have (on average 1.1842105263157894) internal successors, (540), 464 states have internal predecessors, (540), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 7 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-15 03:39:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 571 transitions. [2022-02-15 03:39:12,535 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 571 transitions. Word has length 59 [2022-02-15 03:39:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:12,538 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 571 transitions. [2022-02-15 03:39:12,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 03:39:12,539 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 571 transitions. [2022-02-15 03:39:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 03:39:12,541 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:12,541 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:12,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 03:39:12,541 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:12,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1813715541, now seen corresponding path program 5 times [2022-02-15 03:39:12,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:12,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010069856] [2022-02-15 03:39:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:12,542 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:12,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:12,543 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:13,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:13,288 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 03:39:13,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:13,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010069856] [2022-02-15 03:39:13,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010069856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:13,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:13,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 03:39:13,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318437197] [2022-02-15 03:39:13,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:13,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 03:39:13,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:13,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 03:39:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:39:13,290 INFO L87 Difference]: Start difference. First operand 481 states and 571 transitions. Second operand has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 03:39:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:14,702 INFO L93 Difference]: Finished difference Result 601 states and 713 transitions. [2022-02-15 03:39:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 03:39:14,702 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 59 [2022-02-15 03:39:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:14,704 INFO L225 Difference]: With dead ends: 601 [2022-02-15 03:39:14,704 INFO L226 Difference]: Without dead ends: 599 [2022-02-15 03:39:14,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=443, Invalid=2527, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 03:39:14,706 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 225 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:14,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 92 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-02-15 03:39:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 511. [2022-02-15 03:39:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 486 states have (on average 1.191358024691358) internal successors, (579), 494 states have internal predecessors, (579), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 7 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-15 03:39:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 610 transitions. [2022-02-15 03:39:15,182 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 610 transitions. Word has length 59 [2022-02-15 03:39:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:15,182 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 610 transitions. [2022-02-15 03:39:15,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 03:39:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 610 transitions. [2022-02-15 03:39:15,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 03:39:15,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:15,183 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, 1, 1] [2022-02-15 03:39:15,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 03:39:15,184 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1054815615, now seen corresponding path program 2 times [2022-02-15 03:39:15,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:15,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953149708] [2022-02-15 03:39:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:15,186 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:15,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:15,187 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 03:39:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 03:39:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:15,566 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:15,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953149708] [2022-02-15 03:39:15,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1953149708] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:15,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:15,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 03:39:15,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049198421] [2022-02-15 03:39:15,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:15,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 03:39:15,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:15,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 03:39:15,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:39:15,568 INFO L87 Difference]: Start difference. First operand 511 states and 610 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 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 03:39:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:16,863 INFO L93 Difference]: Finished difference Result 604 states and 720 transitions. [2022-02-15 03:39:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:39:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 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 62 [2022-02-15 03:39:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:16,865 INFO L225 Difference]: With dead ends: 604 [2022-02-15 03:39:16,866 INFO L226 Difference]: Without dead ends: 602 [2022-02-15 03:39:16,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1463, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 03:39:16,866 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 202 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:16,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 86 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-02-15 03:39:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 531. [2022-02-15 03:39:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 501 states have (on average 1.18562874251497) internal successors, (594), 511 states have internal predecessors, (594), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (19), 9 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 03:39:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 633 transitions. [2022-02-15 03:39:17,239 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 633 transitions. Word has length 62 [2022-02-15 03:39:17,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:17,239 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 633 transitions. [2022-02-15 03:39:17,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 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 03:39:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 633 transitions. [2022-02-15 03:39:17,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 03:39:17,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:17,241 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, 1, 1] [2022-02-15 03:39:17,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 03:39:17,241 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:17,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1873320726, now seen corresponding path program 3 times [2022-02-15 03:39:17,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:17,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349525093] [2022-02-15 03:39:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:17,243 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:17,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:17,247 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:17,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:17,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 03:39:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:17,713 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 03:39:17,713 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:17,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349525093] [2022-02-15 03:39:17,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [349525093] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:17,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:17,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:39:17,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927664632] [2022-02-15 03:39:17,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:17,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:39:17,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:17,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:39:17,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:39:17,715 INFO L87 Difference]: Start difference. First operand 531 states and 633 transitions. Second operand has 26 states, 24 states have (on average 2.25) internal successors, (54), 24 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 03:39:19,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:19,206 INFO L93 Difference]: Finished difference Result 729 states and 875 transitions. [2022-02-15 03:39:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 03:39:19,207 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.25) internal successors, (54), 24 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 62 [2022-02-15 03:39:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:19,208 INFO L225 Difference]: With dead ends: 729 [2022-02-15 03:39:19,209 INFO L226 Difference]: Without dead ends: 663 [2022-02-15 03:39:19,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=403, Invalid=3629, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 03:39:19,209 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 221 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:19,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 101 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-02-15 03:39:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 587. [2022-02-15 03:39:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 550 states have (on average 1.1836363636363636) internal successors, (651), 564 states have internal predecessors, (651), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-15 03:39:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 702 transitions. [2022-02-15 03:39:19,624 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 702 transitions. Word has length 62 [2022-02-15 03:39:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:19,624 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 702 transitions. [2022-02-15 03:39:19,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.25) internal successors, (54), 24 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 03:39:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 702 transitions. [2022-02-15 03:39:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 03:39:19,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:19,625 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, 1, 1] [2022-02-15 03:39:19,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 03:39:19,625 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:19,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:19,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2048520356, now seen corresponding path program 4 times [2022-02-15 03:39:19,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:19,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379270962] [2022-02-15 03:39:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:19,628 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:19,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:19,629 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:19,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:19,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 03:39:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:19,943 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:19,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379270962] [2022-02-15 03:39:19,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [379270962] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:19,943 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:19,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:39:19,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940566029] [2022-02-15 03:39:19,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:19,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:39:19,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:19,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:39:19,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:39:19,944 INFO L87 Difference]: Start difference. First operand 587 states and 702 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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 03:39:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:21,464 INFO L93 Difference]: Finished difference Result 732 states and 881 transitions. [2022-02-15 03:39:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 03:39:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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 62 [2022-02-15 03:39:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:21,466 INFO L225 Difference]: With dead ends: 732 [2022-02-15 03:39:21,466 INFO L226 Difference]: Without dead ends: 730 [2022-02-15 03:39:21,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=2304, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 03:39:21,474 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 255 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:21,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 87 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-02-15 03:39:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 617. [2022-02-15 03:39:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 578 states have (on average 1.1885813148788926) internal successors, (687), 593 states have internal predecessors, (687), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (26), 11 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-15 03:39:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 740 transitions. [2022-02-15 03:39:21,921 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 740 transitions. Word has length 62 [2022-02-15 03:39:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:21,922 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 740 transitions. [2022-02-15 03:39:21,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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 03:39:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 740 transitions. [2022-02-15 03:39:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 03:39:21,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:21,940 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 03:39:21,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 03:39:21,941 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1516193256, now seen corresponding path program 6 times [2022-02-15 03:39:21,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:21,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376531713] [2022-02-15 03:39:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:21,942 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:21,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:21,943 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:22,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:22,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 03:39:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:22,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 03:39:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:22,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 03:39:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:22,098 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 03:39:22,098 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:22,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376531713] [2022-02-15 03:39:22,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376531713] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:22,098 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:22,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:39:22,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877099494] [2022-02-15 03:39:22,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:22,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:39:22,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:39:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:22,099 INFO L87 Difference]: Start difference. First operand 617 states and 740 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 03:39:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:23,211 INFO L93 Difference]: Finished difference Result 805 states and 969 transitions. [2022-02-15 03:39:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:39:23,211 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 03:39:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:23,217 INFO L225 Difference]: With dead ends: 805 [2022-02-15 03:39:23,217 INFO L226 Difference]: Without dead ends: 728 [2022-02-15 03:39:23,217 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 03:39:23,218 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 204 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:23,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 95 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-02-15 03:39:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 548. [2022-02-15 03:39:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 521 states have (on average 1.182341650671785) internal successors, (616), 531 states have internal predecessors, (616), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-15 03:39:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 650 transitions. [2022-02-15 03:39:23,636 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 650 transitions. Word has length 65 [2022-02-15 03:39:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:23,637 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 650 transitions. [2022-02-15 03:39:23,637 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 03:39:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 650 transitions. [2022-02-15 03:39:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 03:39:23,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:23,638 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 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, 1, 1] [2022-02-15 03:39:23,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 03:39:23,638 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1181046921, now seen corresponding path program 1 times [2022-02-15 03:39:23,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:23,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060308312] [2022-02-15 03:39:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:23,639 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:23,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:23,640 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:24,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:24,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 03:39:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:24,575 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 03:39:24,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:24,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060308312] [2022-02-15 03:39:24,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1060308312] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:24,575 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:24,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 03:39:24,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660776689] [2022-02-15 03:39:24,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:24,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 03:39:24,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 03:39:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 03:39:24,576 INFO L87 Difference]: Start difference. First operand 548 states and 650 transitions. Second operand has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 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 03:39:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:28,607 INFO L93 Difference]: Finished difference Result 747 states and 882 transitions. [2022-02-15 03:39:28,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 03:39:28,607 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 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 03:39:28,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:28,610 INFO L225 Difference]: With dead ends: 747 [2022-02-15 03:39:28,610 INFO L226 Difference]: Without dead ends: 745 [2022-02-15 03:39:28,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1857, Invalid=11025, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 03:39:28,617 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 290 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:28,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 116 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:39:28,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-02-15 03:39:29,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 590. [2022-02-15 03:39:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 562 states have (on average 1.1743772241992882) internal successors, (660), 572 states have internal predecessors, (660), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 8 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 03:39:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 696 transitions. [2022-02-15 03:39:29,086 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 696 transitions. Word has length 64 [2022-02-15 03:39:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:29,086 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 696 transitions. [2022-02-15 03:39:29,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 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 03:39:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 696 transitions. [2022-02-15 03:39:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 03:39:29,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:29,088 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 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 03:39:29,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 03:39:29,088 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:29,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:29,088 INFO L85 PathProgramCache]: Analyzing trace with hash 968751897, now seen corresponding path program 4 times [2022-02-15 03:39:29,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:29,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585789655] [2022-02-15 03:39:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:29,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:29,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:29,091 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:29,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:29,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 03:39:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:29,886 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 03:39:29,886 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:29,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585789655] [2022-02-15 03:39:29,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [585789655] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:29,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:29,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 03:39:29,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158288144] [2022-02-15 03:39:29,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:29,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 03:39:29,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:29,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 03:39:29,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 03:39:29,888 INFO L87 Difference]: Start difference. First operand 590 states and 696 transitions. Second operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 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 03:39:31,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:31,925 INFO L93 Difference]: Finished difference Result 638 states and 748 transitions. [2022-02-15 03:39:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 03:39:31,925 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 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 03:39:31,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:31,928 INFO L225 Difference]: With dead ends: 638 [2022-02-15 03:39:31,928 INFO L226 Difference]: Without dead ends: 622 [2022-02-15 03:39:31,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 03:39:31,929 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 144 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:31,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 125 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:39:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-02-15 03:39:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 551. [2022-02-15 03:39:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 523 states have (on average 1.1778202676864244) internal successors, (616), 533 states have internal predecessors, (616), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 8 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 03:39:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 652 transitions. [2022-02-15 03:39:32,333 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 652 transitions. Word has length 64 [2022-02-15 03:39:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:32,333 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 652 transitions. [2022-02-15 03:39:32,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 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 03:39:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 652 transitions. [2022-02-15 03:39:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 03:39:32,335 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:32,335 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 03:39:32,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 03:39:32,335 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1602966465, now seen corresponding path program 7 times [2022-02-15 03:39:32,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:32,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102460007] [2022-02-15 03:39:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:32,336 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:32,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:32,337 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:32,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:32,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 03:39:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:32,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 03:39:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:32,713 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 03:39:32,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:32,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102460007] [2022-02-15 03:39:32,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102460007] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:32,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:32,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:39:32,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683327481] [2022-02-15 03:39:32,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:32,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:39:32,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:32,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:39:32,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:39:32,715 INFO L87 Difference]: Start difference. First operand 551 states and 652 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 03:39:34,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:34,150 INFO L93 Difference]: Finished difference Result 627 states and 745 transitions. [2022-02-15 03:39:34,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:39:34,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 03:39:34,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:34,153 INFO L225 Difference]: With dead ends: 627 [2022-02-15 03:39:34,153 INFO L226 Difference]: Without dead ends: 625 [2022-02-15 03:39:34,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:39:34,153 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:34,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 99 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-02-15 03:39:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 579. [2022-02-15 03:39:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 545 states have (on average 1.1743119266055047) internal successors, (640), 557 states have internal predecessors, (640), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (22), 11 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-15 03:39:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 686 transitions. [2022-02-15 03:39:34,624 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 686 transitions. Word has length 65 [2022-02-15 03:39:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:34,624 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 686 transitions. [2022-02-15 03:39:34,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 03:39:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 686 transitions. [2022-02-15 03:39:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 03:39:34,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:34,625 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:34,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 03:39:34,625 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:34,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:34,626 INFO L85 PathProgramCache]: Analyzing trace with hash 873252058, now seen corresponding path program 5 times [2022-02-15 03:39:34,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:34,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512798711] [2022-02-15 03:39:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:34,627 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:34,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:34,628 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:35,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:35,255 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 03:39:35,255 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:35,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512798711] [2022-02-15 03:39:35,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [512798711] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:35,255 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:35,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:39:35,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057680249] [2022-02-15 03:39:35,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:35,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:39:35,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:39:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:39:35,256 INFO L87 Difference]: Start difference. First operand 579 states and 686 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:36,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:36,993 INFO L93 Difference]: Finished difference Result 704 states and 838 transitions. [2022-02-15 03:39:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 03:39:36,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 03:39:36,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:36,995 INFO L225 Difference]: With dead ends: 704 [2022-02-15 03:39:36,995 INFO L226 Difference]: Without dead ends: 638 [2022-02-15 03:39:36,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=2184, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 03:39:36,996 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:36,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 58 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:39:36,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-02-15 03:39:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 595. [2022-02-15 03:39:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 561 states have (on average 1.1729055258467023) internal successors, (658), 573 states have internal predecessors, (658), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (22), 11 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-15 03:39:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 704 transitions. [2022-02-15 03:39:37,493 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 704 transitions. Word has length 64 [2022-02-15 03:39:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:37,493 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 704 transitions. [2022-02-15 03:39:37,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 704 transitions. [2022-02-15 03:39:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 03:39:37,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:37,494 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:37,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 03:39:37,494 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:37,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1868426852, now seen corresponding path program 6 times [2022-02-15 03:39:37,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:37,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593253838] [2022-02-15 03:39:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:37,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:37,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:37,497 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:38,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:38,152 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:38,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593253838] [2022-02-15 03:39:38,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593253838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:38,152 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:38,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 03:39:38,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999182050] [2022-02-15 03:39:38,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:38,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 03:39:38,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:38,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 03:39:38,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:39:38,153 INFO L87 Difference]: Start difference. First operand 595 states and 704 transitions. Second operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 03:39:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:41,953 INFO L93 Difference]: Finished difference Result 852 states and 1015 transitions. [2022-02-15 03:39:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-15 03:39:41,953 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 03:39:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:41,956 INFO L225 Difference]: With dead ends: 852 [2022-02-15 03:39:41,956 INFO L226 Difference]: Without dead ends: 850 [2022-02-15 03:39:41,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5398 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1924, Invalid=14078, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 03:39:41,957 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 465 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:41,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 98 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:39:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-02-15 03:39:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 615. [2022-02-15 03:39:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 579 states have (on average 1.1744386873920554) internal successors, (680), 592 states have internal predecessors, (680), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 11 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 03:39:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 728 transitions. [2022-02-15 03:39:42,472 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 728 transitions. Word has length 64 [2022-02-15 03:39:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:42,472 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 728 transitions. [2022-02-15 03:39:42,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 03:39:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 728 transitions. [2022-02-15 03:39:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 03:39:42,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:42,473 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:42,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 03:39:42,475 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:42,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1566333674, now seen corresponding path program 6 times [2022-02-15 03:39:42,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:42,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477608905] [2022-02-15 03:39:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:42,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:42,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:42,482 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:42,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:42,945 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:42,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477608905] [2022-02-15 03:39:42,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [477608905] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:42,945 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:42,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:39:42,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883499507] [2022-02-15 03:39:42,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:42,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:39:42,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:42,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:39:42,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:42,946 INFO L87 Difference]: Start difference. First operand 615 states and 728 transitions. Second operand has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 03:39:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:44,545 INFO L93 Difference]: Finished difference Result 931 states and 1115 transitions. [2022-02-15 03:39:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 03:39:44,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 64 [2022-02-15 03:39:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:44,548 INFO L225 Difference]: With dead ends: 931 [2022-02-15 03:39:44,548 INFO L226 Difference]: Without dead ends: 775 [2022-02-15 03:39:44,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=644, Invalid=2662, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 03:39:44,549 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:44,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 86 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-15 03:39:45,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 646. [2022-02-15 03:39:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 610 states have (on average 1.180327868852459) internal successors, (720), 623 states have internal predecessors, (720), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 11 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 03:39:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 768 transitions. [2022-02-15 03:39:45,079 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 768 transitions. Word has length 64 [2022-02-15 03:39:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:45,079 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 768 transitions. [2022-02-15 03:39:45,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 03:39:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 768 transitions. [2022-02-15 03:39:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 03:39:45,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:45,081 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:45,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 03:39:45,081 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:45,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:45,081 INFO L85 PathProgramCache]: Analyzing trace with hash 998054042, now seen corresponding path program 7 times [2022-02-15 03:39:45,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:45,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180795854] [2022-02-15 03:39:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:45,082 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:45,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:45,083 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:45,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:45,694 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 03:39:45,694 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:45,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180795854] [2022-02-15 03:39:45,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [180795854] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:45,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:45,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 03:39:45,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018157334] [2022-02-15 03:39:45,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:45,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 03:39:45,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 03:39:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:39:45,695 INFO L87 Difference]: Start difference. First operand 646 states and 768 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 03:39:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:47,435 INFO L93 Difference]: Finished difference Result 818 states and 971 transitions. [2022-02-15 03:39:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 03:39:47,436 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 03:39:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:47,438 INFO L225 Difference]: With dead ends: 818 [2022-02-15 03:39:47,438 INFO L226 Difference]: Without dead ends: 727 [2022-02-15 03:39:47,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=4024, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 03:39:47,439 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:47,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 69 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-02-15 03:39:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 664. [2022-02-15 03:39:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 626 states have (on average 1.1805111821086263) internal successors, (739), 640 states have internal predecessors, (739), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 11 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-15 03:39:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 789 transitions. [2022-02-15 03:39:47,971 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 789 transitions. Word has length 64 [2022-02-15 03:39:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:47,971 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 789 transitions. [2022-02-15 03:39:47,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 03:39:47,971 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 789 transitions. [2022-02-15 03:39:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 03:39:47,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:47,972 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 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] [2022-02-15 03:39:47,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 03:39:47,972 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash -777241936, now seen corresponding path program 2 times [2022-02-15 03:39:47,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:47,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570590343] [2022-02-15 03:39:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:47,974 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:47,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:47,975 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 03:39:47,996 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-15 03:39:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 03:39:48,031 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-15 03:39:48,031 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-15 03:39:48,033 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 03:39:48,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 03:39:48,036 INFO L732 BasicCegarLoop]: Path program histogram: [7, 7, 6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1] [2022-02-15 03:39:48,038 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 03:39:48,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 03:39:48 BoogieIcfgContainer [2022-02-15 03:39:48,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 03:39:48,059 INFO L158 Benchmark]: Toolchain (without parser) took 91803.00ms. Allocated memory was 175.1MB in the beginning and 941.6MB in the end (delta: 766.5MB). Free memory was 124.0MB in the beginning and 714.7MB in the end (delta: -590.7MB). Peak memory consumption was 177.1MB. Max. memory is 8.0GB. [2022-02-15 03:39:48,059 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 175.1MB. Free memory was 140.7MB in the beginning and 140.6MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 03:39:48,059 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.85ms. Allocated memory is still 175.1MB. Free memory was 123.9MB in the beginning and 149.6MB in the end (delta: -25.7MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. [2022-02-15 03:39:48,059 INFO L158 Benchmark]: Boogie Preprocessor took 23.92ms. Allocated memory is still 175.1MB. Free memory was 149.3MB in the beginning and 147.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 03:39:48,059 INFO L158 Benchmark]: RCFGBuilder took 258.11ms. Allocated memory is still 175.1MB. Free memory was 147.8MB in the beginning and 136.2MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-15 03:39:48,059 INFO L158 Benchmark]: TraceAbstraction took 91278.78ms. Allocated memory was 175.1MB in the beginning and 941.6MB in the end (delta: 766.5MB). Free memory was 136.0MB in the beginning and 714.7MB in the end (delta: -578.7MB). Peak memory consumption was 189.4MB. Max. memory is 8.0GB. [2022-02-15 03:39:48,065 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 175.1MB. Free memory was 140.7MB in the beginning and 140.6MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.85ms. Allocated memory is still 175.1MB. Free memory was 123.9MB in the beginning and 149.6MB in the end (delta: -25.7MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.92ms. Allocated memory is still 175.1MB. Free memory was 149.3MB in the beginning and 147.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 258.11ms. Allocated memory is still 175.1MB. Free memory was 147.8MB in the beginning and 136.2MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 91278.78ms. Allocated memory was 175.1MB in the beginning and 941.6MB in the end (delta: 766.5MB). Free memory was 136.0MB in the beginning and 714.7MB in the end (delta: -578.7MB). Peak memory consumption was 189.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j