/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/loop-acceleration/diamond_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:44:47,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:44:47,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:44:47,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 19:44:47,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 19:44:47,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 19:44:47,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 19:44:47,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 19:44:47,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 19:44:47,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 19:44:47,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 19:44:47,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 19:44:47,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 19:44:47,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 19:44:47,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 19:44:47,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 19:44:47,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 19:44:47,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 19:44:47,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 19:44:47,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 19:44:47,757 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 19:44:47,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 19:44:47,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 19:44:47,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 19:44:47,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 19:44:47,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 19:44:47,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 19:44:47,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 19:44:47,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 19:44:47,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 19:44:47,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 19:44:47,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 19:44:47,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 19:44:47,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 19:44:47,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 19:44:47,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 19:44:47,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 19:44:47,766 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 19:44:47,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 19:44:47,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:44:47,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:44:47,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:44:47,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:44:47,773 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:44:47,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:44:47,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:44:47,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:44:47,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:44:47,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:44:47,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:44:47,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:44:47,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:44:47,775 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:44:47,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:44:47,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:44:47,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:44:47,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:44:47,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:44:47,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:44:47,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:44:47,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:44:47,776 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:44:47,776 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:44:47,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:44:47,777 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:44:47,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:44:47,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:44:47,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:44:47,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:44:47,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:44:47,975 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:44:47,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-1.c [2022-04-06 19:44:48,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ceeb3f8/bc2bd0b1dc6843e4b037977c1e44934c/FLAGa7b847959 [2022-04-06 19:44:48,399 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:44:48,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-1.c [2022-04-06 19:44:48,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ceeb3f8/bc2bd0b1dc6843e4b037977c1e44934c/FLAGa7b847959 [2022-04-06 19:44:48,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ceeb3f8/bc2bd0b1dc6843e4b037977c1e44934c [2022-04-06 19:44:48,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:44:48,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:44:48,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:44:48,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:44:48,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:44:48,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:44:48" (1/1) ... [2022-04-06 19:44:48,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310ca21f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48, skipping insertion in model container [2022-04-06 19:44:48,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:44:48" (1/1) ... [2022-04-06 19:44:48,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:44:48,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:44:48,563 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-1.c[373,386] [2022-04-06 19:44:48,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:44:48,587 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:44:48,604 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-1.c[373,386] [2022-04-06 19:44:48,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:44:48,615 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:44:48,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48 WrapperNode [2022-04-06 19:44:48,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:44:48,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:44:48,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:44:48,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:44:48,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48" (1/1) ... [2022-04-06 19:44:48,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48" (1/1) ... [2022-04-06 19:44:48,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48" (1/1) ... [2022-04-06 19:44:48,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48" (1/1) ... [2022-04-06 19:44:48,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48" (1/1) ... [2022-04-06 19:44:48,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48" (1/1) ... [2022-04-06 19:44:48,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48" (1/1) ... [2022-04-06 19:44:48,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:44:48,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:44:48,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:44:48,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:44:48,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48" (1/1) ... [2022-04-06 19:44:48,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:44:48,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:48,696 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) [2022-04-06 19:44:48,701 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 [2022-04-06 19:44:48,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:44:48,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:44:48,725 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:44:48,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:44:48,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:44:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:44:48,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:44:48,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:44:48,771 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:44:48,772 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:44:48,851 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:44:48,855 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:44:48,855 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 19:44:48,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:44:48 BoogieIcfgContainer [2022-04-06 19:44:48,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:44:48,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:44:48,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:44:48,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:44:48,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:44:48" (1/3) ... [2022-04-06 19:44:48,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dba5118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:44:48, skipping insertion in model container [2022-04-06 19:44:48,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:48" (2/3) ... [2022-04-06 19:44:48,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dba5118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:44:48, skipping insertion in model container [2022-04-06 19:44:48,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:44:48" (3/3) ... [2022-04-06 19:44:48,862 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-1.c [2022-04-06 19:44:48,866 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:44:48,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:44:48,894 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:44:48,898 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, 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 [2022-04-06 19:44:48,898 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:44:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-04-06 19:44:48,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:44:48,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:48,913 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:48,914 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1418018830, now seen corresponding path program 1 times [2022-04-06 19:44:48,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:48,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [407066904] [2022-04-06 19:44:48,931 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:44:48,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1418018830, now seen corresponding path program 2 times [2022-04-06 19:44:48,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:48,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287135740] [2022-04-06 19:44:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:48,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:49,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:49,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:49,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287135740] [2022-04-06 19:44:49,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287135740] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:49,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:49,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:44:49,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [407066904] [2022-04-06 19:44:49,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [407066904] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:49,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:49,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:44:49,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598672025] [2022-04-06 19:44:49,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:49,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:44:49,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:49,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:44:49,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:44:49,082 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:49,122 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-04-06 19:44:49,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:44:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 19:44:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:49,127 INFO L225 Difference]: With dead ends: 30 [2022-04-06 19:44:49,127 INFO L226 Difference]: Without dead ends: 13 [2022-04-06 19:44:49,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:44:49,131 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:49,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-06 19:44:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-06 19:44:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-04-06 19:44:49,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-04-06 19:44:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:49,170 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-04-06 19:44:49,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-04-06 19:44:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:44:49,171 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:49,171 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:49,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:44:49,180 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1427254040, now seen corresponding path program 1 times [2022-04-06 19:44:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:49,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1060580299] [2022-04-06 19:44:49,182 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:44:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1427254040, now seen corresponding path program 2 times [2022-04-06 19:44:49,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:49,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529946015] [2022-04-06 19:44:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:49,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:49,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:49,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:49,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529946015] [2022-04-06 19:44:49,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529946015] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:49,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:49,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:49,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:49,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1060580299] [2022-04-06 19:44:49,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1060580299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:49,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:49,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:49,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530633752] [2022-04-06 19:44:49,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:49,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:44:49,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:44:49,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:44:49,278 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:49,300 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-04-06 19:44:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:44:49,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 19:44:49,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:49,302 INFO L225 Difference]: With dead ends: 20 [2022-04-06 19:44:49,302 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 19:44:49,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:44:49,304 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:49,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 19:44:49,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-04-06 19:44:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-04-06 19:44:49,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-04-06 19:44:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:49,308 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-04-06 19:44:49,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-06 19:44:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 19:44:49,309 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:49,309 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:49,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:44:49,309 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:49,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:49,309 INFO L85 PathProgramCache]: Analyzing trace with hash -397340509, now seen corresponding path program 1 times [2022-04-06 19:44:49,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:49,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2128880355] [2022-04-06 19:44:49,320 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:49,320 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash -397340509, now seen corresponding path program 2 times [2022-04-06 19:44:49,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:49,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570017700] [2022-04-06 19:44:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:49,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:49,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:49,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:49,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570017700] [2022-04-06 19:44:49,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570017700] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:49,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638661080] [2022-04-06 19:44:49,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:49,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:49,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:49,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:49,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:44:49,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:49,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:44:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:49,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:49,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638661080] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:49,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:49,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2022-04-06 19:44:49,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:49,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2128880355] [2022-04-06 19:44:49,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2128880355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:49,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:49,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:44:49,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426548373] [2022-04-06 19:44:49,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:49,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:44:49,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:49,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:44:49,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:44:49,700 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:49,754 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-04-06 19:44:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:44:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 19:44:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:49,757 INFO L225 Difference]: With dead ends: 22 [2022-04-06 19:44:49,757 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 19:44:49,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:44:49,765 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:49,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 19:44:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-04-06 19:44:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-04-06 19:44:49,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2022-04-06 19:44:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:49,773 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-04-06 19:44:49,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-04-06 19:44:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 19:44:49,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:49,774 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:49,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 19:44:49,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:49,994 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash -454598811, now seen corresponding path program 1 times [2022-04-06 19:44:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:49,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180354066] [2022-04-06 19:44:49,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:49,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:49,997 INFO L85 PathProgramCache]: Analyzing trace with hash -454598811, now seen corresponding path program 2 times [2022-04-06 19:44:49,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:49,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542784697] [2022-04-06 19:44:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:49,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:50,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:50,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542784697] [2022-04-06 19:44:50,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542784697] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490824244] [2022-04-06 19:44:50,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:50,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:50,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:50,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:50,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:44:50,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:50,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:50,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:44:50,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:50,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:50,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490824244] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:50,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:50,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2022-04-06 19:44:50,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:50,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180354066] [2022-04-06 19:44:50,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180354066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:50,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:50,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:44:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648262509] [2022-04-06 19:44:50,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:50,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:44:50,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:44:50,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:44:50,292 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:50,352 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-04-06 19:44:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:44:50,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 19:44:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:50,354 INFO L225 Difference]: With dead ends: 23 [2022-04-06 19:44:50,354 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 19:44:50,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:44:50,358 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:50,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 19:44:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-04-06 19:44:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-04-06 19:44:50,365 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2022-04-06 19:44:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:50,365 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-04-06 19:44:50,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-04-06 19:44:50,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 19:44:50,367 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:50,367 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:50,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:50,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 19:44:50,587 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1507084702, now seen corresponding path program 3 times [2022-04-06 19:44:50,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:50,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954430228] [2022-04-06 19:44:50,604 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:50,604 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1507084702, now seen corresponding path program 4 times [2022-04-06 19:44:50,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:50,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371367299] [2022-04-06 19:44:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:50,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:50,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:50,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:50,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371367299] [2022-04-06 19:44:50,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371367299] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:50,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781538570] [2022-04-06 19:44:50,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:50,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:50,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:50,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:50,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:44:50,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:50,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:50,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:44:50,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:50,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:50,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781538570] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:50,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:50,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 19:44:50,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:50,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954430228] [2022-04-06 19:44:50,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954430228] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:50,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:50,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:44:50,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930431097] [2022-04-06 19:44:50,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:50,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:44:50,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:50,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:44:50,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:44:50,826 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:50,867 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-04-06 19:44:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:44:50,868 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 [2022-04-06 19:44:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:50,868 INFO L225 Difference]: With dead ends: 25 [2022-04-06 19:44:50,868 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 19:44:50,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:44:50,869 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:50,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:50,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 19:44:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-04-06 19:44:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-04-06 19:44:50,872 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2022-04-06 19:44:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:50,872 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-04-06 19:44:50,872 INFO L479 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) [2022-04-06 19:44:50,872 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-04-06 19:44:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 19:44:50,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:50,873 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:50,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 19:44:51,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:51,086 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:51,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1449826400, now seen corresponding path program 1 times [2022-04-06 19:44:51,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:51,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970620553] [2022-04-06 19:44:51,088 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:51,088 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1449826400, now seen corresponding path program 2 times [2022-04-06 19:44:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:51,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6234499] [2022-04-06 19:44:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:51,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:51,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:51,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:51,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6234499] [2022-04-06 19:44:51,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6234499] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:51,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:51,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:51,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:51,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970620553] [2022-04-06 19:44:51,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970620553] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:51,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:51,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:51,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137142287] [2022-04-06 19:44:51,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:51,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:44:51,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:51,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:44:51,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:44:51,131 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2022-04-06 19:44:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:51,159 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-04-06 19:44:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:44:51,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2022-04-06 19:44:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:51,160 INFO L225 Difference]: With dead ends: 29 [2022-04-06 19:44:51,160 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 19:44:51,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:44:51,161 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:51,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 19:44:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-06 19:44:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-04-06 19:44:51,165 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2022-04-06 19:44:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:51,165 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-04-06 19:44:51,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2022-04-06 19:44:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-04-06 19:44:51,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 19:44:51,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:51,166 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:51,166 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 19:44:51,166 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:51,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:51,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1978535968, now seen corresponding path program 3 times [2022-04-06 19:44:51,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:51,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1072974328] [2022-04-06 19:44:51,167 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:51,167 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1978535968, now seen corresponding path program 4 times [2022-04-06 19:44:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:51,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109175190] [2022-04-06 19:44:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:51,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:51,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:51,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:51,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109175190] [2022-04-06 19:44:51,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109175190] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:51,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:51,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:51,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:51,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1072974328] [2022-04-06 19:44:51,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1072974328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:51,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:51,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:51,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106829922] [2022-04-06 19:44:51,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:51,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:44:51,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:51,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:44:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:44:51,225 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2022-04-06 19:44:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:51,245 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-04-06 19:44:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:44:51,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2022-04-06 19:44:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:51,246 INFO L225 Difference]: With dead ends: 29 [2022-04-06 19:44:51,246 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 19:44:51,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:44:51,247 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:51,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:51,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 19:44:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-06 19:44:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-04-06 19:44:51,251 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2022-04-06 19:44:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:51,251 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-04-06 19:44:51,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2022-04-06 19:44:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-04-06 19:44:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 19:44:51,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:51,251 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:51,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 19:44:51,251 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:51,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2035794270, now seen corresponding path program 3 times [2022-04-06 19:44:51,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:51,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [723280262] [2022-04-06 19:44:51,253 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:51,253 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2035794270, now seen corresponding path program 4 times [2022-04-06 19:44:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:51,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212383142] [2022-04-06 19:44:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:51,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:51,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:51,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212383142] [2022-04-06 19:44:51,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212383142] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386967369] [2022-04-06 19:44:51,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:51,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:51,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:51,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:51,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:44:51,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:51,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:51,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:44:51,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:51,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:44:51,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386967369] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:51,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:51,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2022-04-06 19:44:51,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:51,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [723280262] [2022-04-06 19:44:51,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [723280262] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:51,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:51,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:44:51,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49072080] [2022-04-06 19:44:51,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:51,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:44:51,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:51,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:44:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:44:51,459 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:51,504 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-04-06 19:44:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:44:51,504 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 [2022-04-06 19:44:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:51,505 INFO L225 Difference]: With dead ends: 29 [2022-04-06 19:44:51,505 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 19:44:51,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:44:51,505 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:51,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 18 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 19:44:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-04-06 19:44:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-04-06 19:44:51,510 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2022-04-06 19:44:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:51,510 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-04-06 19:44:51,510 INFO L479 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) [2022-04-06 19:44:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-04-06 19:44:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 19:44:51,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:51,511 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:51,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 19:44:51,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:51,743 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2003644377, now seen corresponding path program 5 times [2022-04-06 19:44:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2078380030] [2022-04-06 19:44:51,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:51,748 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2003644377, now seen corresponding path program 6 times [2022-04-06 19:44:51,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:51,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484013571] [2022-04-06 19:44:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:51,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:51,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:51,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:51,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484013571] [2022-04-06 19:44:51,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484013571] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:51,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652745382] [2022-04-06 19:44:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:51,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:51,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:51,807 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:51,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:44:51,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 19:44:51,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:51,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 19:44:51,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:51,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:51,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652745382] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:51,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:51,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 19:44:51,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:51,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2078380030] [2022-04-06 19:44:51,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2078380030] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:51,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:51,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:44:51,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818000755] [2022-04-06 19:44:51,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:51,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:44:51,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:51,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:44:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:44:51,955 INFO L87 Difference]: Start difference. First operand 23 states and 25 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) [2022-04-06 19:44:52,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:52,018 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-04-06 19:44:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:44:52,019 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 [2022-04-06 19:44:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:52,019 INFO L225 Difference]: With dead ends: 31 [2022-04-06 19:44:52,019 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 19:44:52,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:44:52,020 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:52,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 19:44:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-06 19:44:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-06 19:44:52,025 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2022-04-06 19:44:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:52,025 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-06 19:44:52,025 INFO L479 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) [2022-04-06 19:44:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-06 19:44:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 19:44:52,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:52,025 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:52,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:52,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:52,246 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:52,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1146207585, now seen corresponding path program 5 times [2022-04-06 19:44:52,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:52,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [58772384] [2022-04-06 19:44:52,247 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:52,248 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1146207585, now seen corresponding path program 6 times [2022-04-06 19:44:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:52,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295427829] [2022-04-06 19:44:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:52,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:52,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:52,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:52,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295427829] [2022-04-06 19:44:52,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295427829] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:52,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102450342] [2022-04-06 19:44:52,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:52,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:52,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:52,332 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:52,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 19:44:52,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 19:44:52,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:52,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:44:52,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:52,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:44:52,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102450342] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:52,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:52,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 13 [2022-04-06 19:44:52,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:52,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [58772384] [2022-04-06 19:44:52,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [58772384] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:52,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:52,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:44:52,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282540348] [2022-04-06 19:44:52,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:52,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:44:52,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:44:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:44:52,558 INFO L87 Difference]: Start difference. First operand 25 states and 27 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) [2022-04-06 19:44:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:52,622 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-06 19:44:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:44:52,623 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 [2022-04-06 19:44:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:52,623 INFO L225 Difference]: With dead ends: 33 [2022-04-06 19:44:52,623 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 19:44:52,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:44:52,624 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:52,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 33 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 19:44:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 19:44:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-04-06 19:44:52,628 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 17 [2022-04-06 19:44:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:52,629 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-04-06 19:44:52,629 INFO L479 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) [2022-04-06 19:44:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-06 19:44:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 19:44:52,629 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:52,629 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:52,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 19:44:52,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:52,848 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:52,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1838845100, now seen corresponding path program 7 times [2022-04-06 19:44:52,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:52,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2064901380] [2022-04-06 19:44:52,850 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:52,850 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:52,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1838845100, now seen corresponding path program 8 times [2022-04-06 19:44:52,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:52,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720046342] [2022-04-06 19:44:52,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:52,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:52,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:52,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:52,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720046342] [2022-04-06 19:44:52,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720046342] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:52,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671293239] [2022-04-06 19:44:52,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:52,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:52,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:52,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:52,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 19:44:52,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:52,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:52,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 19:44:52,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:52,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:53,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671293239] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:53,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:53,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 19:44:53,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:53,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2064901380] [2022-04-06 19:44:53,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2064901380] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:53,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:53,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:44:53,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660185118] [2022-04-06 19:44:53,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:53,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:44:53,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:44:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:44:53,078 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:53,185 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-04-06 19:44:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:44:53,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 19:44:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:53,185 INFO L225 Difference]: With dead ends: 35 [2022-04-06 19:44:53,185 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 19:44:53,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:44:53,186 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:53,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 19:44:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-04-06 19:44:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:53,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-04-06 19:44:53,190 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 19 [2022-04-06 19:44:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:53,191 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-04-06 19:44:53,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-04-06 19:44:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 19:44:53,191 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:53,191 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:53,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:53,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:53,404 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash -951895204, now seen corresponding path program 7 times [2022-04-06 19:44:53,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:53,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1627651227] [2022-04-06 19:44:53,405 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:53,405 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:53,406 INFO L85 PathProgramCache]: Analyzing trace with hash -951895204, now seen corresponding path program 8 times [2022-04-06 19:44:53,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:53,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600519294] [2022-04-06 19:44:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:53,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:53,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:53,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600519294] [2022-04-06 19:44:53,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600519294] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:53,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351110810] [2022-04-06 19:44:53,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:53,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:53,468 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:53,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 19:44:53,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:53,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:53,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 19:44:53,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:53,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:53,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351110810] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:53,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:53,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 19:44:53,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:53,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1627651227] [2022-04-06 19:44:53,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1627651227] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:53,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:53,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:44:53,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129199189] [2022-04-06 19:44:53,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:53,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:44:53,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:44:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:44:53,615 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:53,694 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-04-06 19:44:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:44:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 19:44:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:53,696 INFO L225 Difference]: With dead ends: 37 [2022-04-06 19:44:53,696 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 19:44:53,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:44:53,697 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:53,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 33 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 19:44:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-04-06 19:44:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-04-06 19:44:53,709 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 19 [2022-04-06 19:44:53,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:53,710 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-04-06 19:44:53,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-04-06 19:44:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:44:53,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:53,713 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:53,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:53,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 19:44:53,930 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:53,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash -799357937, now seen corresponding path program 9 times [2022-04-06 19:44:53,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:53,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060698535] [2022-04-06 19:44:53,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:53,933 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash -799357937, now seen corresponding path program 10 times [2022-04-06 19:44:53,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:53,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152900053] [2022-04-06 19:44:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:53,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:54,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:54,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:54,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152900053] [2022-04-06 19:44:54,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152900053] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:54,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588542181] [2022-04-06 19:44:54,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:54,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:54,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:54,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:54,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 19:44:54,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:54,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:54,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 19:44:54,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:54,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:44:54,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588542181] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:54,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:54,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 19 [2022-04-06 19:44:54,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:54,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060698535] [2022-04-06 19:44:54,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060698535] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:54,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:54,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:44:54,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63099335] [2022-04-06 19:44:54,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:54,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:44:54,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:54,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:44:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:44:54,266 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:54,431 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-04-06 19:44:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:44:54,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 19:44:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:54,432 INFO L225 Difference]: With dead ends: 39 [2022-04-06 19:44:54,432 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 19:44:54,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:44:54,433 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:54,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 19:44:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-06 19:44:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-06 19:44:54,439 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 21 [2022-04-06 19:44:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:54,439 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-06 19:44:54,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-06 19:44:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:44:54,439 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:54,439 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:54,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:54,640 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 19:44:54,640 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1098709209, now seen corresponding path program 9 times [2022-04-06 19:44:54,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:54,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [774322432] [2022-04-06 19:44:54,641 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:54,642 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:54,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1098709209, now seen corresponding path program 10 times [2022-04-06 19:44:54,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:54,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568445339] [2022-04-06 19:44:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:54,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:54,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:54,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:54,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568445339] [2022-04-06 19:44:54,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568445339] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:54,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658124624] [2022-04-06 19:44:54,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:54,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:54,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:54,724 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:54,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 19:44:54,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:54,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 19:44:54,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:54,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 19:44:55,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658124624] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:55,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:55,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 18 [2022-04-06 19:44:55,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:55,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [774322432] [2022-04-06 19:44:55,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [774322432] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:55,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:55,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:44:55,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168010791] [2022-04-06 19:44:55,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:55,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:44:55,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:44:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:44:55,014 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:55,168 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-04-06 19:44:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:44:55,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 19:44:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:55,168 INFO L225 Difference]: With dead ends: 41 [2022-04-06 19:44:55,168 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 19:44:55,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:44:55,169 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:55,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 19:44:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-06 19:44:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-04-06 19:44:55,175 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 21 [2022-04-06 19:44:55,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:55,175 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-04-06 19:44:55,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-04-06 19:44:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 19:44:55,176 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:55,176 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:55,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:55,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 19:44:55,392 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1715393034, now seen corresponding path program 11 times [2022-04-06 19:44:55,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:55,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1619804116] [2022-04-06 19:44:55,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:55,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1715393034, now seen corresponding path program 12 times [2022-04-06 19:44:55,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:55,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848686261] [2022-04-06 19:44:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:55,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:55,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:55,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:55,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848686261] [2022-04-06 19:44:55,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848686261] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:55,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115320550] [2022-04-06 19:44:55,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:55,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:55,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:55,473 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:55,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 19:44:55,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:44:55,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:55,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:44:55,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:55,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:44:55,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115320550] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:55,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:44:55,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-04-06 19:44:55,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:55,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1619804116] [2022-04-06 19:44:55,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1619804116] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:55,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:55,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:44:55,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64532489] [2022-04-06 19:44:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:55,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:44:55,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:55,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:44:55,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:44:55,713 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:55,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:55,847 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-04-06 19:44:55,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:44:55,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 19:44:55,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:55,848 INFO L225 Difference]: With dead ends: 40 [2022-04-06 19:44:55,848 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 19:44:55,848 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:44:55,849 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:55,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:55,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 19:44:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 19:44:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-04-06 19:44:55,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 23 [2022-04-06 19:44:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:55,852 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-04-06 19:44:55,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-04-06 19:44:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 19:44:55,852 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:55,852 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:55,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:56,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 19:44:56,053 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash 339561238, now seen corresponding path program 11 times [2022-04-06 19:44:56,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:56,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [930150665] [2022-04-06 19:44:56,054 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:56,054 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:56,054 INFO L85 PathProgramCache]: Analyzing trace with hash 339561238, now seen corresponding path program 12 times [2022-04-06 19:44:56,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:56,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814348602] [2022-04-06 19:44:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:56,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:56,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:56,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:56,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814348602] [2022-04-06 19:44:56,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814348602] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:56,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582791947] [2022-04-06 19:44:56,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:56,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:56,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:56,136 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:56,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 19:44:56,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:44:56,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:56,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:44:56,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:56,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:56,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582791947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:56,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:56,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 19:44:56,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:56,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [930150665] [2022-04-06 19:44:56,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [930150665] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:56,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:56,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:44:56,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910390532] [2022-04-06 19:44:56,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:56,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:44:56,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:56,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:44:56,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:44:56,353 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2022-04-06 19:44:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:56,421 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-04-06 19:44:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:44:56,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 23 [2022-04-06 19:44:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:56,421 INFO L225 Difference]: With dead ends: 32 [2022-04-06 19:44:56,421 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 19:44:56,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:44:56,422 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:56,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 28 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:56,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 19:44:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-06 19:44:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-04-06 19:44:56,425 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2022-04-06 19:44:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:56,425 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-04-06 19:44:56,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2022-04-06 19:44:56,425 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-04-06 19:44:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 19:44:56,426 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:56,426 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:56,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:56,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 19:44:56,626 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:56,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:56,627 INFO L85 PathProgramCache]: Analyzing trace with hash 942801427, now seen corresponding path program 13 times [2022-04-06 19:44:56,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:56,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1794783100] [2022-04-06 19:44:56,628 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:56,628 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash 942801427, now seen corresponding path program 14 times [2022-04-06 19:44:56,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:56,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428241562] [2022-04-06 19:44:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:56,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:56,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:56,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:56,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428241562] [2022-04-06 19:44:56,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428241562] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:56,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012865322] [2022-04-06 19:44:56,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:56,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:56,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:56,708 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:56,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 19:44:56,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:56,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:56,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:44:56,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:56,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:56,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012865322] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:56,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:56,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 19:44:56,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:56,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1794783100] [2022-04-06 19:44:56,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1794783100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:56,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:56,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:44:56,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560372011] [2022-04-06 19:44:56,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:56,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:44:56,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:44:56,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:44:56,950 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2022-04-06 19:44:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:57,087 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-04-06 19:44:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:44:57,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 [2022-04-06 19:44:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:57,087 INFO L225 Difference]: With dead ends: 34 [2022-04-06 19:44:57,087 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 19:44:57,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:44:57,088 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:57,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 19:44:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 19:44:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-04-06 19:44:57,092 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2022-04-06 19:44:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:57,092 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-04-06 19:44:57,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2022-04-06 19:44:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-04-06 19:44:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 19:44:57,093 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:57,093 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:57,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:57,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 19:44:57,303 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash 836038096, now seen corresponding path program 15 times [2022-04-06 19:44:57,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:57,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425518626] [2022-04-06 19:44:57,305 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:57,305 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:57,305 INFO L85 PathProgramCache]: Analyzing trace with hash 836038096, now seen corresponding path program 16 times [2022-04-06 19:44:57,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:57,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699598884] [2022-04-06 19:44:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:57,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:57,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:57,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:57,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699598884] [2022-04-06 19:44:57,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699598884] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:57,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805938098] [2022-04-06 19:44:57,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:57,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:57,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:57,406 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:57,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 19:44:57,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:57,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:57,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 19:44:57,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:57,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 19:44:57,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805938098] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:57,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:57,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 6] total 24 [2022-04-06 19:44:57,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:57,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425518626] [2022-04-06 19:44:57,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425518626] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:57,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:57,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:44:57,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353521476] [2022-04-06 19:44:57,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:57,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:44:57,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:44:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:44:57,743 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:57,931 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-04-06 19:44:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:44:57,932 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 19:44:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:57,933 INFO L225 Difference]: With dead ends: 36 [2022-04-06 19:44:57,933 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 19:44:57,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:44:57,933 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:57,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 58 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:57,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 19:44:57,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-04-06 19:44:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-04-06 19:44:57,938 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2022-04-06 19:44:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:57,938 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-04-06 19:44:57,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-04-06 19:44:57,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 19:44:57,940 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:57,940 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:57,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 19:44:58,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:58,159 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1315692109, now seen corresponding path program 17 times [2022-04-06 19:44:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:58,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068794164] [2022-04-06 19:44:58,161 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:58,161 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:58,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1315692109, now seen corresponding path program 18 times [2022-04-06 19:44:58,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:58,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131429478] [2022-04-06 19:44:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:58,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:58,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:58,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131429478] [2022-04-06 19:44:58,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131429478] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:58,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281161425] [2022-04-06 19:44:58,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:58,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:58,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:58,347 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:58,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 19:44:58,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:44:58,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:58,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:44:58,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:58,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:58,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281161425] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:58,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:58,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 19:44:58,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:58,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068794164] [2022-04-06 19:44:58,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068794164] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:58,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:58,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:44:58,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240057739] [2022-04-06 19:44:58,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:58,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:44:58,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:58,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:44:58,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:44:58,737 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:58,920 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-04-06 19:44:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:44:58,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 19:44:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:58,921 INFO L225 Difference]: With dead ends: 38 [2022-04-06 19:44:58,921 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 19:44:58,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=799, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:44:58,921 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:58,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 33 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 19:44:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-06 19:44:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-04-06 19:44:58,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2022-04-06 19:44:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:58,926 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-04-06 19:44:58,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-04-06 19:44:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 19:44:58,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:58,926 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:58,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:59,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:59,127 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1593269366, now seen corresponding path program 19 times [2022-04-06 19:44:59,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:59,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902285566] [2022-04-06 19:44:59,128 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:44:59,128 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1593269366, now seen corresponding path program 20 times [2022-04-06 19:44:59,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:59,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375404821] [2022-04-06 19:44:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:59,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:59,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:59,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375404821] [2022-04-06 19:44:59,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375404821] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:59,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553927497] [2022-04-06 19:44:59,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:59,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:59,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:59,258 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:59,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 19:44:59,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:59,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:59,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:44:59,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:59,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:59,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553927497] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:59,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:59,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 19:44:59,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:59,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902285566] [2022-04-06 19:44:59,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902285566] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:59,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:59,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:44:59,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140695489] [2022-04-06 19:44:59,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:59,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:44:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:59,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:44:59,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:44:59,642 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-04-06 19:44:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:59,841 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-04-06 19:44:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:44:59,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 [2022-04-06 19:44:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:59,842 INFO L225 Difference]: With dead ends: 40 [2022-04-06 19:44:59,842 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 19:44:59,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:44:59,843 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:59,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 19:44:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 19:44:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-04-06 19:44:59,847 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2022-04-06 19:44:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:59,847 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-04-06 19:44:59,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-04-06 19:44:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-04-06 19:44:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:44:59,848 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:59,848 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:59,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:00,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:00,048 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1081537145, now seen corresponding path program 21 times [2022-04-06 19:45:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:00,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302628255] [2022-04-06 19:45:00,050 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:00,050 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1081537145, now seen corresponding path program 22 times [2022-04-06 19:45:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:00,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870519506] [2022-04-06 19:45:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:00,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:00,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:00,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870519506] [2022-04-06 19:45:00,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870519506] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:00,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485252105] [2022-04-06 19:45:00,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:00,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:00,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:00,238 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:00,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 19:45:00,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:00,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:00,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 19:45:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:00,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 19:45:00,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485252105] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:00,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:00,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 6] total 30 [2022-04-06 19:45:00,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:00,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302628255] [2022-04-06 19:45:00,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302628255] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:00,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:00,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:45:00,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423722624] [2022-04-06 19:45:00,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:00,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:45:00,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:00,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:45:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:45:00,700 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2022-04-06 19:45:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:00,926 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-04-06 19:45:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:45:00,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 [2022-04-06 19:45:00,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:00,926 INFO L225 Difference]: With dead ends: 42 [2022-04-06 19:45:00,926 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 19:45:00,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:45:00,927 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:00,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 18 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 19:45:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-04-06 19:45:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-04-06 19:45:00,932 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2022-04-06 19:45:00,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:00,932 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-04-06 19:45:00,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2022-04-06 19:45:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-04-06 19:45:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 19:45:00,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:00,932 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:00,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:01,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:01,133 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1066855492, now seen corresponding path program 23 times [2022-04-06 19:45:01,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:01,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223780585] [2022-04-06 19:45:01,134 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:01,134 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:01,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1066855492, now seen corresponding path program 24 times [2022-04-06 19:45:01,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:01,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271106825] [2022-04-06 19:45:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:01,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:01,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:01,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271106825] [2022-04-06 19:45:01,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271106825] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674737884] [2022-04-06 19:45:01,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:01,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:01,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:01,245 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:01,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 19:45:01,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 19:45:01,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:01,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 19:45:01,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:01,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 19:45:01,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674737884] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:01,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:01,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 6] total 27 [2022-04-06 19:45:01,701 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:01,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223780585] [2022-04-06 19:45:01,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223780585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:01,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:01,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:45:01,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314797043] [2022-04-06 19:45:01,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:01,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:45:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:01,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:45:01,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:45:01,702 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:01,969 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-04-06 19:45:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:45:01,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 19:45:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:01,971 INFO L225 Difference]: With dead ends: 44 [2022-04-06 19:45:01,971 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 19:45:01,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:45:01,972 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:01,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 38 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:01,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 19:45:01,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-04-06 19:45:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-04-06 19:45:01,977 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2022-04-06 19:45:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:01,977 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-04-06 19:45:01,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-04-06 19:45:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:45:01,977 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:01,977 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:01,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:02,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:02,179 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash -207089727, now seen corresponding path program 25 times [2022-04-06 19:45:02,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:02,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063344324] [2022-04-06 19:45:02,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:02,180 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash -207089727, now seen corresponding path program 26 times [2022-04-06 19:45:02,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:02,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8807937] [2022-04-06 19:45:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:02,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:02,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:02,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:02,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8807937] [2022-04-06 19:45:02,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8807937] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:02,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970751367] [2022-04-06 19:45:02,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:02,355 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:02,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 19:45:02,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:02,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:02,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 19:45:02,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:02,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:02,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970751367] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:02,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:02,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 19:45:02,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:02,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063344324] [2022-04-06 19:45:02,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063344324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:02,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:02,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:45:02,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689720702] [2022-04-06 19:45:02,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:02,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:45:02,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:02,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:45:02,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:45:02,753 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2022-04-06 19:45:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:02,946 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-04-06 19:45:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:45:02,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 37 [2022-04-06 19:45:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:02,946 INFO L225 Difference]: With dead ends: 46 [2022-04-06 19:45:02,946 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 19:45:02,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=563, Invalid=1507, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:45:02,947 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:02,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 18 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 19:45:02,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-04-06 19:45:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-04-06 19:45:02,952 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2022-04-06 19:45:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:02,952 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-04-06 19:45:02,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2022-04-06 19:45:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-04-06 19:45:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 19:45:02,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:02,953 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:02,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:03,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:03,163 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:03,164 INFO L85 PathProgramCache]: Analyzing trace with hash -402765826, now seen corresponding path program 27 times [2022-04-06 19:45:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:03,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730578535] [2022-04-06 19:45:03,165 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:03,165 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash -402765826, now seen corresponding path program 28 times [2022-04-06 19:45:03,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:03,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270575735] [2022-04-06 19:45:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:03,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:03,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:03,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:03,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270575735] [2022-04-06 19:45:03,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270575735] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:03,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840035425] [2022-04-06 19:45:03,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:03,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:03,330 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:03,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 19:45:03,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:03,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:03,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 19:45:03,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:03,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 19:45:03,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840035425] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:03,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:03,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 6] total 23 [2022-04-06 19:45:03,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730578535] [2022-04-06 19:45:03,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730578535] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:03,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:03,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:45:03,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007492508] [2022-04-06 19:45:03,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:03,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:45:03,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:45:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:45:03,626 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2022-04-06 19:45:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:03,914 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-04-06 19:45:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:45:03,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 [2022-04-06 19:45:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:03,915 INFO L225 Difference]: With dead ends: 48 [2022-04-06 19:45:03,915 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 19:45:03,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:45:03,916 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:03,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 28 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 19:45:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-06 19:45:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-04-06 19:45:03,921 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2022-04-06 19:45:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:03,921 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-04-06 19:45:03,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2022-04-06 19:45:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-04-06 19:45:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 19:45:03,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:03,921 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:03,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:04,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-04-06 19:45:04,132 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash 531064059, now seen corresponding path program 29 times [2022-04-06 19:45:04,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:04,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640608565] [2022-04-06 19:45:04,133 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:04,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:04,133 INFO L85 PathProgramCache]: Analyzing trace with hash 531064059, now seen corresponding path program 30 times [2022-04-06 19:45:04,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:04,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939048224] [2022-04-06 19:45:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:04,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:04,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:04,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:04,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939048224] [2022-04-06 19:45:04,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939048224] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:04,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121833817] [2022-04-06 19:45:04,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:04,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:04,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:04,401 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:04,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 19:45:04,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 19:45:04,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:04,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 19:45:04,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:04,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 19:45:05,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121833817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:05,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:05,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 6] total 31 [2022-04-06 19:45:05,035 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:05,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640608565] [2022-04-06 19:45:05,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640608565] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:05,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:05,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:45:05,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814883964] [2022-04-06 19:45:05,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:05,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:45:05,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:45:05,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:45:05,036 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2022-04-06 19:45:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:05,416 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-04-06 19:45:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:45:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 [2022-04-06 19:45:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:05,417 INFO L225 Difference]: With dead ends: 50 [2022-04-06 19:45:05,417 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 19:45:05,418 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:45:05,418 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:05,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 58 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 19:45:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-04-06 19:45:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-04-06 19:45:05,424 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2022-04-06 19:45:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:05,424 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-04-06 19:45:05,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2022-04-06 19:45:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-04-06 19:45:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 19:45:05,424 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:05,424 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:05,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:05,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 19:45:05,630 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:05,631 INFO L85 PathProgramCache]: Analyzing trace with hash 293418680, now seen corresponding path program 31 times [2022-04-06 19:45:05,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:05,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [303380112] [2022-04-06 19:45:05,632 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:05,632 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:05,632 INFO L85 PathProgramCache]: Analyzing trace with hash 293418680, now seen corresponding path program 32 times [2022-04-06 19:45:05,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:05,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484726171] [2022-04-06 19:45:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:05,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:05,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:05,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:05,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484726171] [2022-04-06 19:45:05,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484726171] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:05,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284076023] [2022-04-06 19:45:05,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:05,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:05,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:05,842 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:05,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 19:45:05,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:05,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:05,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 19:45:05,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:06,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 19:45:06,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284076023] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:06,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:06,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 6] total 40 [2022-04-06 19:45:06,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:06,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [303380112] [2022-04-06 19:45:06,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [303380112] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:06,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:06,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:45:06,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675694111] [2022-04-06 19:45:06,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:06,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:45:06,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:06,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:45:06,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1388, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:45:06,471 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 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) [2022-04-06 19:45:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:06,921 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-04-06 19:45:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:45:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 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 [2022-04-06 19:45:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:06,922 INFO L225 Difference]: With dead ends: 52 [2022-04-06 19:45:06,922 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 19:45:06,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=2904, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:45:06,923 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:06,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 78 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 19:45:06,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 19:45:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-04-06 19:45:06,929 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2022-04-06 19:45:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:06,929 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-04-06 19:45:06,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 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) [2022-04-06 19:45:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-04-06 19:45:06,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 19:45:06,929 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:06,929 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:06,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:07,130 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 19:45:07,130 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash -450523851, now seen corresponding path program 33 times [2022-04-06 19:45:07,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:07,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1112113409] [2022-04-06 19:45:07,132 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:07,132 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:07,132 INFO L85 PathProgramCache]: Analyzing trace with hash -450523851, now seen corresponding path program 34 times [2022-04-06 19:45:07,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:07,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039404373] [2022-04-06 19:45:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:07,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:07,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:07,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:07,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039404373] [2022-04-06 19:45:07,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039404373] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044526684] [2022-04-06 19:45:07,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:07,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:07,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:07,384 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:07,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 19:45:07,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:07,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:07,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 19:45:07,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:07,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 19:45:08,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044526684] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:08,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:08,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 6] total 42 [2022-04-06 19:45:08,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:08,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1112113409] [2022-04-06 19:45:08,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1112113409] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:08,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:08,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:45:08,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706706959] [2022-04-06 19:45:08,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:08,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:45:08,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:08,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:45:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:45:08,062 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 21 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) [2022-04-06 19:45:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:08,517 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-04-06 19:45:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:45:08,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 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 45 [2022-04-06 19:45:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:08,518 INFO L225 Difference]: With dead ends: 54 [2022-04-06 19:45:08,518 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 19:45:08,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:45:08,520 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:08,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 103 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 19:45:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-04-06 19:45:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-04-06 19:45:08,526 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2022-04-06 19:45:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:08,526 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-04-06 19:45:08,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 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) [2022-04-06 19:45:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-04-06 19:45:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 19:45:08,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:08,526 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:08,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:08,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:08,737 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1880242290, now seen corresponding path program 35 times [2022-04-06 19:45:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:08,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [363931164] [2022-04-06 19:45:08,738 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:08,739 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1880242290, now seen corresponding path program 36 times [2022-04-06 19:45:08,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:08,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492322686] [2022-04-06 19:45:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:08,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:08,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:08,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:08,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492322686] [2022-04-06 19:45:08,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492322686] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:08,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932096925] [2022-04-06 19:45:08,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:08,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:08,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:08,994 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:09,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 19:45:09,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 19:45:09,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:09,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 19:45:09,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:09,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 19:45:09,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932096925] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:09,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:09,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 6] total 36 [2022-04-06 19:45:09,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [363931164] [2022-04-06 19:45:09,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [363931164] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:09,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:09,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:45:09,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74884760] [2022-04-06 19:45:09,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:09,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:45:09,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:09,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:45:09,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:45:09,750 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:10,194 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-04-06 19:45:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:45:10,194 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 19:45:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:10,195 INFO L225 Difference]: With dead ends: 56 [2022-04-06 19:45:10,195 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 19:45:10,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=274, Invalid=2696, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:45:10,196 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:10,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 108 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 19:45:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 19:45:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-04-06 19:45:10,203 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2022-04-06 19:45:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:10,204 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-04-06 19:45:10,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-04-06 19:45:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 19:45:10,204 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:10,204 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:10,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 19:45:10,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 19:45:10,408 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:10,409 INFO L85 PathProgramCache]: Analyzing trace with hash -226424721, now seen corresponding path program 37 times [2022-04-06 19:45:10,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:10,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1766945984] [2022-04-06 19:45:10,410 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:10,410 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash -226424721, now seen corresponding path program 38 times [2022-04-06 19:45:10,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:10,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115609546] [2022-04-06 19:45:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:10,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:10,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:10,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115609546] [2022-04-06 19:45:10,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115609546] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281263664] [2022-04-06 19:45:10,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:10,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:10,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:10,672 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:10,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:10,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 19:45:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:10,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 19:45:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:11,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 19:45:11,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281263664] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:11,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:11,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 6] total 46 [2022-04-06 19:45:11,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1766945984] [2022-04-06 19:45:11,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1766945984] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:11,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:11,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:45:11,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237800072] [2022-04-06 19:45:11,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:11,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:45:11,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:11,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:45:11,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:45:11,463 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:11,988 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-04-06 19:45:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:45:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 19:45:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:11,989 INFO L225 Difference]: With dead ends: 58 [2022-04-06 19:45:11,989 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 19:45:11,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=339, Invalid=3951, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:45:11,990 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:11,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 28 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 19:45:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-04-06 19:45:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-04-06 19:45:11,997 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2022-04-06 19:45:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:11,997 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-04-06 19:45:11,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-04-06 19:45:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:45:11,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:11,997 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:12,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:12,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 19:45:12,213 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1803825876, now seen corresponding path program 39 times [2022-04-06 19:45:12,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:12,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157348819] [2022-04-06 19:45:12,215 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:12,215 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1803825876, now seen corresponding path program 40 times [2022-04-06 19:45:12,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372152823] [2022-04-06 19:45:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:12,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:12,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:12,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372152823] [2022-04-06 19:45:12,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372152823] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:12,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213030798] [2022-04-06 19:45:12,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:12,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:12,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:12,499 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:12,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 19:45:12,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:12,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:12,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 19:45:12,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:13,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-04-06 19:45:13,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213030798] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:13,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:13,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 6] total 48 [2022-04-06 19:45:13,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:13,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157348819] [2022-04-06 19:45:13,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157348819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:13,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:13,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 19:45:13,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769160018] [2022-04-06 19:45:13,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:13,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 19:45:13,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:13,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 19:45:13,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:45:13,285 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 24 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) [2022-04-06 19:45:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:13,862 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-04-06 19:45:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:45:13,862 INFO L78 Accepts]: Start accepts. Automaton has has 24 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 [2022-04-06 19:45:13,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:13,863 INFO L225 Difference]: With dead ends: 60 [2022-04-06 19:45:13,863 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 19:45:13,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=356, Invalid=4336, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 19:45:13,864 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:13,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 23 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 19:45:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-06 19:45:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-04-06 19:45:13,872 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2022-04-06 19:45:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:13,872 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-04-06 19:45:13,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 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) [2022-04-06 19:45:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-04-06 19:45:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 19:45:13,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:13,873 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:13,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:14,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:14,087 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:14,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:14,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1562880343, now seen corresponding path program 41 times [2022-04-06 19:45:14,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:14,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1400696075] [2022-04-06 19:45:14,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:14,089 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1562880343, now seen corresponding path program 42 times [2022-04-06 19:45:14,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:14,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225093275] [2022-04-06 19:45:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:14,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:14,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225093275] [2022-04-06 19:45:14,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225093275] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826892639] [2022-04-06 19:45:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:14,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:14,387 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:14,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 19:45:14,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 19:45:14,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:14,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 19:45:14,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:15,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:16,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826892639] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:16,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:16,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 27] total 61 [2022-04-06 19:45:16,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:16,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1400696075] [2022-04-06 19:45:16,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1400696075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:16,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:16,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 19:45:16,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315434352] [2022-04-06 19:45:16,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:16,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 19:45:16,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:16,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 19:45:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=2751, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 19:45:16,224 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2022-04-06 19:45:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:16,842 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-04-06 19:45:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:45:16,842 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 53 [2022-04-06 19:45:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:16,843 INFO L225 Difference]: With dead ends: 62 [2022-04-06 19:45:16,843 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 19:45:16,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1523, Invalid=5283, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 19:45:16,845 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:16,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 23 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 19:45:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-04-06 19:45:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-04-06 19:45:16,852 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2022-04-06 19:45:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:16,852 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-04-06 19:45:16,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2022-04-06 19:45:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-04-06 19:45:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 19:45:16,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:16,853 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:16,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 19:45:17,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:17,055 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1942457114, now seen corresponding path program 43 times [2022-04-06 19:45:17,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145632526] [2022-04-06 19:45:17,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:17,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:17,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1942457114, now seen corresponding path program 44 times [2022-04-06 19:45:17,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:17,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110413657] [2022-04-06 19:45:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:17,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:17,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:17,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110413657] [2022-04-06 19:45:17,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110413657] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053851868] [2022-04-06 19:45:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:17,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:17,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:17,331 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:17,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 19:45:17,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:17,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 19:45:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:17,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-04-06 19:45:18,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053851868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:18,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:18,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 6] total 52 [2022-04-06 19:45:18,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:18,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145632526] [2022-04-06 19:45:18,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145632526] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:18,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:18,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 19:45:18,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763729803] [2022-04-06 19:45:18,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:18,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 19:45:18,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:18,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 19:45:18,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2420, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:45:18,109 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:18,546 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-04-06 19:45:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 19:45:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 19:45:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:18,546 INFO L225 Difference]: With dead ends: 64 [2022-04-06 19:45:18,546 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 19:45:18,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=390, Invalid=5160, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 19:45:18,547 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:18,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 23 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 19:45:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 19:45:18,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-04-06 19:45:18,557 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2022-04-06 19:45:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:18,557 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-04-06 19:45:18,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-04-06 19:45:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 19:45:18,560 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:18,560 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:18,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:18,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:18,777 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:18,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1643513885, now seen corresponding path program 45 times [2022-04-06 19:45:18,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:18,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1545589328] [2022-04-06 19:45:18,778 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:18,778 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:18,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1643513885, now seen corresponding path program 46 times [2022-04-06 19:45:18,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:18,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566222261] [2022-04-06 19:45:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:18,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:19,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:19,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566222261] [2022-04-06 19:45:19,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566222261] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940623312] [2022-04-06 19:45:19,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:19,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:19,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:19,023 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:19,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 19:45:19,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:19,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:19,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 19:45:19,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:19,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 19:45:19,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940623312] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:19,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:19,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 6] total 54 [2022-04-06 19:45:19,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:19,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1545589328] [2022-04-06 19:45:19,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1545589328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:19,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:19,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 19:45:19,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834785230] [2022-04-06 19:45:19,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:19,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 19:45:19,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 19:45:19,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2620, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 19:45:19,697 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:20,190 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-04-06 19:45:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 19:45:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 19:45:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:20,190 INFO L225 Difference]: With dead ends: 66 [2022-04-06 19:45:20,190 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 19:45:20,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=5599, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 19:45:20,192 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:20,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 18 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:20,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 19:45:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-04-06 19:45:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-04-06 19:45:20,205 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2022-04-06 19:45:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:20,205 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-04-06 19:45:20,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-04-06 19:45:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 19:45:20,210 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:20,210 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:20,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:20,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:20,423 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2121879648, now seen corresponding path program 47 times [2022-04-06 19:45:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:20,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [444561144] [2022-04-06 19:45:20,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:20,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:20,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2121879648, now seen corresponding path program 48 times [2022-04-06 19:45:20,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:20,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240510654] [2022-04-06 19:45:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:20,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:20,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:20,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:20,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240510654] [2022-04-06 19:45:20,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240510654] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:20,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986873217] [2022-04-06 19:45:20,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:20,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:20,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:20,700 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:20,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 19:45:21,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 19:45:21,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:21,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 19:45:21,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:21,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 19:45:21,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986873217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:21,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:21,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 6] total 45 [2022-04-06 19:45:21,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:21,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [444561144] [2022-04-06 19:45:21,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [444561144] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:21,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:21,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 19:45:21,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213865261] [2022-04-06 19:45:21,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:21,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 19:45:21,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:21,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 19:45:21,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:45:21,798 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2022-04-06 19:45:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:22,613 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-04-06 19:45:22,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 19:45:22,613 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 [2022-04-06 19:45:22,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:22,614 INFO L225 Difference]: With dead ends: 68 [2022-04-06 19:45:22,614 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 19:45:22,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=358, Invalid=4472, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 19:45:22,615 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:22,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 43 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:45:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 19:45:22,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-06 19:45:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:22,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-04-06 19:45:22,624 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2022-04-06 19:45:22,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:22,624 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-04-06 19:45:22,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2022-04-06 19:45:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-04-06 19:45:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 19:45:22,624 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:22,624 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:22,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:22,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 19:45:22,828 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2025090077, now seen corresponding path program 49 times [2022-04-06 19:45:22,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:22,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934378292] [2022-04-06 19:45:22,830 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:22,830 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:22,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2025090077, now seen corresponding path program 50 times [2022-04-06 19:45:22,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:22,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644264684] [2022-04-06 19:45:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:22,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:23,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:23,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:23,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644264684] [2022-04-06 19:45:23,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644264684] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:23,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603899523] [2022-04-06 19:45:23,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:23,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:23,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:23,151 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:23,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 19:45:23,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:23,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:23,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 19:45:23,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:24,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-04-06 19:45:24,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603899523] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:24,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:24,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 6] total 58 [2022-04-06 19:45:24,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934378292] [2022-04-06 19:45:24,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934378292] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:24,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:24,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 19:45:24,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345798789] [2022-04-06 19:45:24,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:24,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 19:45:24,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 19:45:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3044, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:45:24,266 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:25,160 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-04-06 19:45:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 19:45:25,160 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 19:45:25,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:25,161 INFO L225 Difference]: With dead ends: 70 [2022-04-06 19:45:25,161 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 19:45:25,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=441, Invalid=6531, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 19:45:25,162 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:25,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 23 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:45:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 19:45:25,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-04-06 19:45:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-04-06 19:45:25,172 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2022-04-06 19:45:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:25,172 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-04-06 19:45:25,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-04-06 19:45:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 19:45:25,172 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:25,172 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:25,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:25,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:25,375 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1533345114, now seen corresponding path program 51 times [2022-04-06 19:45:25,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:25,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1060665610] [2022-04-06 19:45:25,380 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:25,380 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1533345114, now seen corresponding path program 52 times [2022-04-06 19:45:25,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:25,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070279608] [2022-04-06 19:45:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:25,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:25,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:25,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:25,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070279608] [2022-04-06 19:45:25,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070279608] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:25,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967063536] [2022-04-06 19:45:25,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:25,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:25,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:25,820 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:25,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 19:45:25,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:25,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 19:45:25,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:26,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-04-06 19:45:27,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967063536] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:27,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:27,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 6] total 60 [2022-04-06 19:45:27,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:27,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1060665610] [2022-04-06 19:45:27,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1060665610] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:27,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:27,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 19:45:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359970113] [2022-04-06 19:45:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:27,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 19:45:27,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 19:45:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:45:27,002 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:27,920 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-04-06 19:45:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 19:45:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 19:45:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:27,921 INFO L225 Difference]: With dead ends: 72 [2022-04-06 19:45:27,921 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 19:45:27,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=458, Invalid=7024, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 19:45:27,922 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:27,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 48 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:45:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 19:45:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-04-06 19:45:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-04-06 19:45:27,932 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2022-04-06 19:45:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:27,932 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-04-06 19:45:27,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-04-06 19:45:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 19:45:27,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:27,933 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:27,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:28,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:28,147 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1412838231, now seen corresponding path program 53 times [2022-04-06 19:45:28,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:28,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668552124] [2022-04-06 19:45:28,149 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:28,149 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:28,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1412838231, now seen corresponding path program 54 times [2022-04-06 19:45:28,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:28,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687840964] [2022-04-06 19:45:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:28,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:28,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:28,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:28,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687840964] [2022-04-06 19:45:28,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687840964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:28,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529872241] [2022-04-06 19:45:28,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:28,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:28,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:28,704 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:28,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 19:45:29,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 19:45:29,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:29,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 19:45:29,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:29,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:34,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529872241] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:34,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:34,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 34] total 77 [2022-04-06 19:45:34,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:34,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668552124] [2022-04-06 19:45:34,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668552124] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:34,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:34,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 19:45:34,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797500011] [2022-04-06 19:45:34,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:34,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 19:45:34,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 19:45:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1448, Invalid=4404, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 19:45:34,631 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:35,642 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-04-06 19:45:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 19:45:35,643 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 19:45:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:35,643 INFO L225 Difference]: With dead ends: 74 [2022-04-06 19:45:35,643 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 19:45:35,644 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2421, Invalid=8499, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 19:45:35,644 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:35,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 153 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:45:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 19:45:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-06 19:45:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-04-06 19:45:35,655 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2022-04-06 19:45:35,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:35,655 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-04-06 19:45:35,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-04-06 19:45:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 19:45:35,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:35,656 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:35,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:35,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 19:45:35,860 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1569840660, now seen corresponding path program 55 times [2022-04-06 19:45:35,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:35,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1629367098] [2022-04-06 19:45:35,861 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:35,861 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:35,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1569840660, now seen corresponding path program 56 times [2022-04-06 19:45:35,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:35,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283258450] [2022-04-06 19:45:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:35,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:36,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283258450] [2022-04-06 19:45:36,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283258450] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093910041] [2022-04-06 19:45:36,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:36,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:36,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:36,307 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:36,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 19:45:36,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:36,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:36,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 19:45:36,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:36,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:37,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093910041] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:37,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:37,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 19:45:37,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:37,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1629367098] [2022-04-06 19:45:37,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1629367098] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:37,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:37,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 19:45:37,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497435982] [2022-04-06 19:45:37,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:37,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 19:45:37,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:37,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 19:45:37,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=985, Invalid=2797, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:45:37,769 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:38,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:38,792 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-04-06 19:45:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 19:45:38,792 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 19:45:38,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:38,793 INFO L225 Difference]: With dead ends: 76 [2022-04-06 19:45:38,793 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 19:45:38,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1970, Invalid=6220, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 19:45:38,794 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:38,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:45:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 19:45:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-04-06 19:45:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-04-06 19:45:38,810 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2022-04-06 19:45:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:38,810 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-04-06 19:45:38,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:38,810 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-04-06 19:45:38,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 19:45:38,811 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:38,811 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:38,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:39,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 19:45:39,027 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:39,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2125319569, now seen corresponding path program 57 times [2022-04-06 19:45:39,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:39,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2009130057] [2022-04-06 19:45:39,028 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:39,028 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:39,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2125319569, now seen corresponding path program 58 times [2022-04-06 19:45:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:39,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161542902] [2022-04-06 19:45:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:39,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:39,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161542902] [2022-04-06 19:45:39,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161542902] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:39,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087969249] [2022-04-06 19:45:39,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:39,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:39,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:39,511 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:39,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 19:45:39,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:39,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:39,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 19:45:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:40,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 19:45:40,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087969249] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:40,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:40,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 6] total 66 [2022-04-06 19:45:40,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:40,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2009130057] [2022-04-06 19:45:40,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2009130057] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:40,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:40,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 19:45:40,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882081434] [2022-04-06 19:45:40,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:40,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 19:45:40,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:40,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 19:45:40,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:45:40,873 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:41,848 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-04-06 19:45:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 19:45:41,848 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 19:45:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:41,849 INFO L225 Difference]: With dead ends: 78 [2022-04-06 19:45:41,849 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 19:45:41,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=509, Invalid=8611, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 19:45:41,850 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:41,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 33 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:45:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 19:45:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-04-06 19:45:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-04-06 19:45:41,861 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2022-04-06 19:45:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:41,861 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-04-06 19:45:41,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-04-06 19:45:41,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 19:45:41,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:41,862 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:41,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:42,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 19:45:42,079 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash -930360882, now seen corresponding path program 59 times [2022-04-06 19:45:42,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:42,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [817610585] [2022-04-06 19:45:42,081 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:42,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:42,081 INFO L85 PathProgramCache]: Analyzing trace with hash -930360882, now seen corresponding path program 60 times [2022-04-06 19:45:42,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:42,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746120332] [2022-04-06 19:45:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:42,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:42,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746120332] [2022-04-06 19:45:42,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746120332] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:42,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506153909] [2022-04-06 19:45:42,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:42,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:42,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:42,444 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:42,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 19:45:44,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-04-06 19:45:44,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:44,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 19:45:44,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:45,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-04-06 19:45:45,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506153909] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:45,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:45,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 6] total 54 [2022-04-06 19:45:45,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:45,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [817610585] [2022-04-06 19:45:45,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [817610585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:45,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:45,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 19:45:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569971081] [2022-04-06 19:45:45,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:45,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 19:45:45,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:45,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 19:45:45,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2634, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 19:45:45,838 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:47,027 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-04-06 19:45:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 19:45:47,027 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 19:45:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:47,028 INFO L225 Difference]: With dead ends: 80 [2022-04-06 19:45:47,028 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 19:45:47,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=442, Invalid=6698, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 19:45:47,029 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:47,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 128 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:45:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 19:45:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-04-06 19:45:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-04-06 19:45:47,041 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2022-04-06 19:45:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:47,041 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-04-06 19:45:47,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-04-06 19:45:47,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 19:45:47,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:47,042 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:47,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:47,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 19:45:47,246 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:47,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:47,247 INFO L85 PathProgramCache]: Analyzing trace with hash 318356171, now seen corresponding path program 61 times [2022-04-06 19:45:47,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:47,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [217882298] [2022-04-06 19:45:47,248 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:47,248 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash 318356171, now seen corresponding path program 62 times [2022-04-06 19:45:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:47,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866432955] [2022-04-06 19:45:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:47,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:47,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:47,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:47,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866432955] [2022-04-06 19:45:47,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866432955] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:47,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454175122] [2022-04-06 19:45:47,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:47,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:47,793 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:47,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 19:45:47,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:47,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:47,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 19:45:47,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:49,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-04-06 19:45:49,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454175122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:49,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:49,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 6] total 70 [2022-04-06 19:45:49,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:49,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [217882298] [2022-04-06 19:45:49,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [217882298] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:49,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:49,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 19:45:49,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562762975] [2022-04-06 19:45:49,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:49,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 19:45:49,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 19:45:49,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=4508, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 19:45:49,320 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:50,562 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-04-06 19:45:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 19:45:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 19:45:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:50,563 INFO L225 Difference]: With dead ends: 82 [2022-04-06 19:45:50,563 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 19:45:50,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=543, Invalid=9759, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 19:45:50,564 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:50,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 78 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:45:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 19:45:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-04-06 19:45:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-04-06 19:45:50,576 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2022-04-06 19:45:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:50,576 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-04-06 19:45:50,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-04-06 19:45:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 19:45:50,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:50,577 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:50,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:50,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:50,793 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2039568520, now seen corresponding path program 63 times [2022-04-06 19:45:50,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:50,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [20631820] [2022-04-06 19:45:50,794 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:50,794 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:50,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2039568520, now seen corresponding path program 64 times [2022-04-06 19:45:50,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:50,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285230045] [2022-04-06 19:45:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:50,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:51,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:51,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285230045] [2022-04-06 19:45:51,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285230045] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387232360] [2022-04-06 19:45:51,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:51,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:51,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:51,353 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:51,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 19:45:51,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:51,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:51,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 19:45:51,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:51,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2022-04-06 19:45:51,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387232360] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:51,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:51,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 6] total 43 [2022-04-06 19:45:51,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:51,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [20631820] [2022-04-06 19:45:51,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [20631820] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:51,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:51,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 19:45:51,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270267011] [2022-04-06 19:45:51,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:51,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 19:45:51,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 19:45:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1648, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 19:45:51,927 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:53,233 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-04-06 19:45:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 19:45:53,233 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 19:45:53,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:53,234 INFO L225 Difference]: With dead ends: 84 [2022-04-06 19:45:53,234 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 19:45:53,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=386, Invalid=5314, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 19:45:53,235 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:53,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 163 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:45:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 19:45:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-06 19:45:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-04-06 19:45:53,253 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2022-04-06 19:45:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:53,253 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-04-06 19:45:53,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-04-06 19:45:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 19:45:53,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:53,254 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:53,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:53,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 19:45:53,462 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:53,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1732740347, now seen corresponding path program 65 times [2022-04-06 19:45:53,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:53,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1287479368] [2022-04-06 19:45:53,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:53,464 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1732740347, now seen corresponding path program 66 times [2022-04-06 19:45:53,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:53,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419007121] [2022-04-06 19:45:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:53,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:53,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:53,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419007121] [2022-04-06 19:45:53,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419007121] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:53,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652031010] [2022-04-06 19:45:53,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:53,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:53,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:53,979 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:53,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 19:45:54,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-04-06 19:45:54,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:54,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 19:45:54,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:55,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 19:45:55,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652031010] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:55,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:55,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 6] total 58 [2022-04-06 19:45:55,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:55,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1287479368] [2022-04-06 19:45:55,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1287479368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:55,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:55,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 19:45:55,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89428197] [2022-04-06 19:45:55,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:55,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 19:45:55,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:55,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 19:45:55,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:45:55,864 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:57,163 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-04-06 19:45:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 19:45:57,163 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 19:45:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:57,164 INFO L225 Difference]: With dead ends: 86 [2022-04-06 19:45:57,164 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 19:45:57,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=481, Invalid=7891, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 19:45:57,170 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:57,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 183 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:45:57,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 19:45:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-04-06 19:45:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-04-06 19:45:57,202 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2022-04-06 19:45:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:57,203 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-04-06 19:45:57,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-04-06 19:45:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 19:45:57,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:57,213 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:57,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:57,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 19:45:57,419 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:57,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:57,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1969163710, now seen corresponding path program 67 times [2022-04-06 19:45:57,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:57,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1372084884] [2022-04-06 19:45:57,421 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:57,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:57,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1969163710, now seen corresponding path program 68 times [2022-04-06 19:45:57,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:57,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589101575] [2022-04-06 19:45:57,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:57,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:58,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:58,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589101575] [2022-04-06 19:45:58,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589101575] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:58,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503381974] [2022-04-06 19:45:58,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:58,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:58,092 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:58,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 19:45:58,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:58,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:58,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 19:45:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:58,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:59,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503381974] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:59,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:59,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 19:45:59,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:59,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1372084884] [2022-04-06 19:45:59,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1372084884] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:59,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:59,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 19:45:59,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586907675] [2022-04-06 19:45:59,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:59,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 19:45:59,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:59,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 19:45:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=4171, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 19:45:59,590 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:01,039 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-04-06 19:46:01,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 19:46:01,039 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 19:46:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:01,040 INFO L225 Difference]: With dead ends: 88 [2022-04-06 19:46:01,040 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 19:46:01,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2474, Invalid=9298, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 19:46:01,042 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2439 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:01,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 103 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2439 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:46:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 19:46:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-04-06 19:46:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-04-06 19:46:01,064 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2022-04-06 19:46:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:01,065 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-04-06 19:46:01,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-04-06 19:46:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 19:46:01,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:01,065 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:01,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:01,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 19:46:01,282 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1538748865, now seen corresponding path program 69 times [2022-04-06 19:46:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:01,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1842207917] [2022-04-06 19:46:01,284 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:01,284 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:01,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1538748865, now seen corresponding path program 70 times [2022-04-06 19:46:01,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:01,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64248833] [2022-04-06 19:46:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:01,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:01,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:01,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:01,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64248833] [2022-04-06 19:46:01,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64248833] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:01,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951644377] [2022-04-06 19:46:01,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:46:01,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:01,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:01,934 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:01,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 19:46:01,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:46:01,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:01,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 19:46:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:02,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2022-04-06 19:46:02,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951644377] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:02,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:02,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 6] total 49 [2022-04-06 19:46:02,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1842207917] [2022-04-06 19:46:02,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1842207917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:02,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:02,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 19:46:02,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42237022] [2022-04-06 19:46:02,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:02,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 19:46:02,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:02,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 19:46:02,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2164, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:46:02,720 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:04,195 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-04-06 19:46:04,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 19:46:04,195 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 19:46:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:04,195 INFO L225 Difference]: With dead ends: 90 [2022-04-06 19:46:04,195 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 19:46:04,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=437, Invalid=6703, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 19:46:04,196 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:04,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 58 Invalid, 2606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:46:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 19:46:04,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-04-06 19:46:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-04-06 19:46:04,211 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2022-04-06 19:46:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:04,211 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-04-06 19:46:04,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-04-06 19:46:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:46:04,211 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:04,211 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:04,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 19:46:04,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:04,427 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:04,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:04,428 INFO L85 PathProgramCache]: Analyzing trace with hash -226943236, now seen corresponding path program 71 times [2022-04-06 19:46:04,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:04,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [225524779] [2022-04-06 19:46:04,429 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:04,429 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:04,429 INFO L85 PathProgramCache]: Analyzing trace with hash -226943236, now seen corresponding path program 72 times [2022-04-06 19:46:04,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:04,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743914050] [2022-04-06 19:46:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:04,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:05,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:05,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743914050] [2022-04-06 19:46:05,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743914050] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236785710] [2022-04-06 19:46:05,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:46:05,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:05,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:05,076 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:05,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 19:46:07,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-04-06 19:46:07,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:07,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 19:46:07,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:08,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-04-06 19:46:09,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236785710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:09,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:09,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 6] total 63 [2022-04-06 19:46:09,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:09,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [225524779] [2022-04-06 19:46:09,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [225524779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:09,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:09,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 19:46:09,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459206365] [2022-04-06 19:46:09,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:09,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 19:46:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:09,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 19:46:09,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 19:46:09,218 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:10,824 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-04-06 19:46:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 19:46:10,824 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 19:46:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:10,824 INFO L225 Difference]: With dead ends: 92 [2022-04-06 19:46:10,824 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 19:46:10,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=526, Invalid=9374, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 19:46:10,825 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:10,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 193 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:46:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 19:46:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-04-06 19:46:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-04-06 19:46:10,840 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2022-04-06 19:46:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:10,841 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-04-06 19:46:10,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-04-06 19:46:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 19:46:10,841 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:10,841 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:10,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:11,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:11,046 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1992848505, now seen corresponding path program 73 times [2022-04-06 19:46:11,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:11,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [387830108] [2022-04-06 19:46:11,048 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:11,048 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1992848505, now seen corresponding path program 74 times [2022-04-06 19:46:11,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:11,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401487411] [2022-04-06 19:46:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:11,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:11,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:11,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:11,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401487411] [2022-04-06 19:46:11,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401487411] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:11,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657402388] [2022-04-06 19:46:11,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:11,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:11,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:11,734 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:11,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 19:46:11,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:11,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:11,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 19:46:11,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:13,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-04-06 19:46:13,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657402388] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:13,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:13,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 6] total 82 [2022-04-06 19:46:13,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [387830108] [2022-04-06 19:46:13,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [387830108] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:13,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:13,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 19:46:13,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501598113] [2022-04-06 19:46:13,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:13,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 19:46:13,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:13,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 19:46:13,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=6260, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 19:46:13,208 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:14,619 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-04-06 19:46:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 19:46:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 19:46:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:14,621 INFO L225 Difference]: With dead ends: 94 [2022-04-06 19:46:14,621 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 19:46:14,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=645, Invalid=13635, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 19:46:14,622 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:14,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 143 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:46:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 19:46:14,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-04-06 19:46:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-04-06 19:46:14,639 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2022-04-06 19:46:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:14,640 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-04-06 19:46:14,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-04-06 19:46:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 19:46:14,640 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:14,640 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:14,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:14,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 19:46:14,857 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash 613965494, now seen corresponding path program 75 times [2022-04-06 19:46:14,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:14,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1337174664] [2022-04-06 19:46:14,858 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:14,858 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:14,858 INFO L85 PathProgramCache]: Analyzing trace with hash 613965494, now seen corresponding path program 76 times [2022-04-06 19:46:14,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:14,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035553761] [2022-04-06 19:46:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:14,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:15,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035553761] [2022-04-06 19:46:15,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035553761] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825951609] [2022-04-06 19:46:15,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:46:15,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:15,390 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:15,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 19:46:15,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:46:15,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 19:46:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:15,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 510 refuted. 0 times theorem prover too weak. 934 trivial. 0 not checked. [2022-04-06 19:46:16,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825951609] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:16,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:16,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 6] total 55 [2022-04-06 19:46:16,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:16,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1337174664] [2022-04-06 19:46:16,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1337174664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:16,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:16,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 19:46:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902598320] [2022-04-06 19:46:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:16,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 19:46:16,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 19:46:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2752, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:46:16,035 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:17,138 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-04-06 19:46:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 19:46:17,138 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-04-06 19:46:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:17,139 INFO L225 Difference]: With dead ends: 96 [2022-04-06 19:46:17,139 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 19:46:17,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=488, Invalid=8254, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 19:46:17,140 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:17,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 28 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:46:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 19:46:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-04-06 19:46:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-04-06 19:46:17,158 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2022-04-06 19:46:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:17,158 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-04-06 19:46:17,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-04-06 19:46:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 19:46:17,158 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:17,158 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:17,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 19:46:17,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-06 19:46:17,366 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:17,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1642680909, now seen corresponding path program 77 times [2022-04-06 19:46:17,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:17,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1928249264] [2022-04-06 19:46:17,368 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:17,368 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1642680909, now seen corresponding path program 78 times [2022-04-06 19:46:17,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:17,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601103191] [2022-04-06 19:46:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:17,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:18,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601103191] [2022-04-06 19:46:18,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601103191] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702728914] [2022-04-06 19:46:18,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:46:18,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:18,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:18,077 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:18,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 19:46:20,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-04-06 19:46:20,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:20,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 19:46:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:21,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:30,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702728914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:30,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:30,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 46] total 107 [2022-04-06 19:46:30,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:30,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1928249264] [2022-04-06 19:46:30,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1928249264] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:30,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:30,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 19:46:30,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739240460] [2022-04-06 19:46:30,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:30,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 19:46:30,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:30,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 19:46:30,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2754, Invalid=8588, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 19:46:30,180 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:31,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:31,872 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-04-06 19:46:31,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 19:46:31,873 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 19:46:31,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:31,873 INFO L225 Difference]: With dead ends: 98 [2022-04-06 19:46:31,873 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 19:46:31,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=4595, Invalid=16867, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 19:46:31,875 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3134 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:31,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 63 Invalid, 3215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3134 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:46:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 19:46:31,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-04-06 19:46:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-04-06 19:46:31,892 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2022-04-06 19:46:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:31,892 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-04-06 19:46:31,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-04-06 19:46:31,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 19:46:31,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:31,893 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:31,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:32,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 19:46:32,099 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:32,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:32,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1321389712, now seen corresponding path program 79 times [2022-04-06 19:46:32,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:32,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1103507375] [2022-04-06 19:46:32,100 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:32,100 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:32,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1321389712, now seen corresponding path program 80 times [2022-04-06 19:46:32,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:32,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785610048] [2022-04-06 19:46:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:32,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:32,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:32,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:32,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785610048] [2022-04-06 19:46:32,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785610048] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:32,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88159921] [2022-04-06 19:46:32,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:32,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:32,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:32,787 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:32,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 19:46:32,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:32,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:32,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 19:46:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:33,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:35,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88159921] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:35,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:35,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 19:46:35,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:35,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1103507375] [2022-04-06 19:46:35,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1103507375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:35,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:35,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 19:46:35,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566451087] [2022-04-06 19:46:35,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:35,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 19:46:35,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:35,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 19:46:35,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=5905, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 19:46:35,132 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:37,146 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-04-06 19:46:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 19:46:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 19:46:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:37,147 INFO L225 Difference]: With dead ends: 100 [2022-04-06 19:46:37,147 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 19:46:37,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2834, Invalid=13168, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 19:46:37,148 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3278 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:37,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 48 Invalid, 3361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3278 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:46:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 19:46:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-04-06 19:46:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-04-06 19:46:37,166 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2022-04-06 19:46:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:37,166 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-04-06 19:46:37,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-04-06 19:46:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:46:37,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:37,166 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:37,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:37,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:37,376 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1798194707, now seen corresponding path program 81 times [2022-04-06 19:46:37,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:37,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2062367276] [2022-04-06 19:46:37,378 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:37,378 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1798194707, now seen corresponding path program 82 times [2022-04-06 19:46:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:37,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625788716] [2022-04-06 19:46:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:38,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:38,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:38,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625788716] [2022-04-06 19:46:38,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625788716] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:38,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830986608] [2022-04-06 19:46:38,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:46:38,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:38,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:38,015 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:38,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 19:46:38,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:46:38,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:38,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 19:46:38,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:39,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2022-04-06 19:46:39,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830986608] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:39,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:39,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 6] total 90 [2022-04-06 19:46:39,654 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:39,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2062367276] [2022-04-06 19:46:39,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2062367276] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:39,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:39,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 19:46:39,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572612199] [2022-04-06 19:46:39,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:39,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 19:46:39,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:39,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 19:46:39,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=7588, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 19:46:39,655 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:41,327 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-04-06 19:46:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 19:46:41,347 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 19:46:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:41,348 INFO L225 Difference]: With dead ends: 102 [2022-04-06 19:46:41,348 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 19:46:41,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=713, Invalid=16579, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 19:46:41,350 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3456 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:41,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 63 Invalid, 3541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3456 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:46:41,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 19:46:41,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-04-06 19:46:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:41,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-04-06 19:46:41,386 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2022-04-06 19:46:41,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:41,386 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-04-06 19:46:41,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:41,387 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-04-06 19:46:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 19:46:41,387 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:41,387 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:41,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:41,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:41,603 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:41,603 INFO L85 PathProgramCache]: Analyzing trace with hash -446294230, now seen corresponding path program 83 times [2022-04-06 19:46:41,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:41,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1031932239] [2022-04-06 19:46:41,604 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:41,604 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash -446294230, now seen corresponding path program 84 times [2022-04-06 19:46:41,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:41,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944832660] [2022-04-06 19:46:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:41,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:42,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:42,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:42,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944832660] [2022-04-06 19:46:42,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944832660] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:42,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731205984] [2022-04-06 19:46:42,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:46:42,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:42,163 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:42,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 19:46:49,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-04-06 19:46:49,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:49,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 19:46:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:50,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:46:59,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731205984] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:59,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:59,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 49] total 115 [2022-04-06 19:46:59,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:59,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1031932239] [2022-04-06 19:46:59,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1031932239] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:59,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:59,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 19:46:59,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195921700] [2022-04-06 19:46:59,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:59,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 19:46:59,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 19:46:59,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3120, Invalid=9990, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 19:46:59,273 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:01,341 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-04-06 19:47:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 19:47:01,341 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-04-06 19:47:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:01,342 INFO L225 Difference]: With dead ends: 104 [2022-04-06 19:47:01,342 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 19:47:01,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4736 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=5170, Invalid=19636, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 19:47:01,346 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 3788 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 3875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:01,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 228 Invalid, 3875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3788 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:47:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 19:47:01,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-04-06 19:47:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2022-04-06 19:47:01,379 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2022-04-06 19:47:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:01,379 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2022-04-06 19:47:01,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2022-04-06 19:47:01,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 19:47:01,380 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:01,380 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:01,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:01,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:01,600 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1649940775, now seen corresponding path program 85 times [2022-04-06 19:47:01,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:01,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1095863826] [2022-04-06 19:47:01,602 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:01,602 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:01,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1649940775, now seen corresponding path program 86 times [2022-04-06 19:47:01,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:01,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026364137] [2022-04-06 19:47:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:02,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:02,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026364137] [2022-04-06 19:47:02,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026364137] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:02,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123892615] [2022-04-06 19:47:02,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:02,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:02,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:02,627 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:02,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 19:47:02,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:02,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:02,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 19:47:02,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:03,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:05,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123892615] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:05,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:05,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 19:47:05,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:05,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1095863826] [2022-04-06 19:47:05,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1095863826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:05,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:05,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 19:47:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558880064] [2022-04-06 19:47:05,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:05,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 19:47:05,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:05,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 19:47:05,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1465, Invalid=6907, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 19:47:05,344 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:07,498 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-04-06 19:47:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 19:47:07,498 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-04-06 19:47:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:07,499 INFO L225 Difference]: With dead ends: 106 [2022-04-06 19:47:07,499 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 19:47:07,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2960, Invalid=15400, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 19:47:07,500 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3784 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:07,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 53 Invalid, 3873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3784 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:47:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 19:47:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-04-06 19:47:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2022-04-06 19:47:07,520 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2022-04-06 19:47:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:07,520 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2022-04-06 19:47:07,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2022-04-06 19:47:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 19:47:07,520 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:07,520 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:07,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:07,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-04-06 19:47:07,735 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1792118756, now seen corresponding path program 87 times [2022-04-06 19:47:07,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:07,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [433360643] [2022-04-06 19:47:07,737 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:07,737 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:07,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1792118756, now seen corresponding path program 88 times [2022-04-06 19:47:07,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:07,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266147226] [2022-04-06 19:47:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:08,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:08,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:08,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266147226] [2022-04-06 19:47:08,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266147226] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:08,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512167217] [2022-04-06 19:47:08,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:08,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:08,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:08,662 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:08,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 19:47:08,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:08,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 19:47:08,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:10,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2022-04-06 19:47:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512167217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:10,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:10,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 6] total 96 [2022-04-06 19:47:10,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [433360643] [2022-04-06 19:47:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [433360643] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:10,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:10,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 19:47:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741476565] [2022-04-06 19:47:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:10,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 19:47:10,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 19:47:10,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=8668, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 19:47:10,838 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:12,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:12,992 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-04-06 19:47:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 19:47:12,993 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-04-06 19:47:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:12,993 INFO L225 Difference]: With dead ends: 108 [2022-04-06 19:47:12,993 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 19:47:12,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4183 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=764, Invalid=18976, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 19:47:12,994 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4004 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 4095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 4004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:12,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 98 Invalid, 4095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 4004 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 19:47:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 19:47:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-04-06 19:47:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2022-04-06 19:47:13,018 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2022-04-06 19:47:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:13,018 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2022-04-06 19:47:13,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2022-04-06 19:47:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 19:47:13,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:13,019 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:13,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:13,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 19:47:13,234 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash 986205025, now seen corresponding path program 89 times [2022-04-06 19:47:13,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:13,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [911673049] [2022-04-06 19:47:13,239 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:13,239 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash 986205025, now seen corresponding path program 90 times [2022-04-06 19:47:13,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:13,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686904109] [2022-04-06 19:47:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:13,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:14,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:14,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:14,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686904109] [2022-04-06 19:47:14,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686904109] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:14,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982535851] [2022-04-06 19:47:14,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:14,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:14,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:14,250 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:14,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 19:47:18,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-04-06 19:47:18,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:18,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 19:47:18,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:19,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:22,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982535851] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:22,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:22,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 51] total 121 [2022-04-06 19:47:22,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:22,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [911673049] [2022-04-06 19:47:22,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [911673049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:22,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:22,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 19:47:22,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391755700] [2022-04-06 19:47:22,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:22,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 19:47:22,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:22,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 19:47:22,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3355, Invalid=11165, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 19:47:22,991 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:25,449 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-04-06 19:47:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 19:47:25,450 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-06 19:47:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:25,450 INFO L225 Difference]: With dead ends: 110 [2022-04-06 19:47:25,450 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 19:47:25,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5109 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5551, Invalid=22171, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 19:47:25,452 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4178 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 4271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:25,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 93 Invalid, 4271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4178 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 19:47:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 19:47:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-04-06 19:47:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-04-06 19:47:25,473 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2022-04-06 19:47:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:25,473 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-04-06 19:47:25,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-04-06 19:47:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 19:47:25,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:25,474 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:25,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:25,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:25,679 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:25,679 INFO L85 PathProgramCache]: Analyzing trace with hash -402777186, now seen corresponding path program 91 times [2022-04-06 19:47:25,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:25,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [642409666] [2022-04-06 19:47:25,680 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:25,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash -402777186, now seen corresponding path program 92 times [2022-04-06 19:47:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:25,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914090100] [2022-04-06 19:47:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:25,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:26,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:26,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:26,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914090100] [2022-04-06 19:47:26,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914090100] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:26,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065525387] [2022-04-06 19:47:26,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:26,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:26,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:26,678 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:26,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 19:47:26,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:26,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:26,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 19:47:26,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:27,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:29,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065525387] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:29,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:29,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-04-06 19:47:29,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:29,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [642409666] [2022-04-06 19:47:29,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [642409666] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:29,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:29,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 19:47:29,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413797243] [2022-04-06 19:47:29,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:29,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 19:47:29,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:29,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 19:47:29,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1507, Invalid=7999, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 19:47:29,681 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:32,070 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-04-06 19:47:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 19:47:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 19:47:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:32,071 INFO L225 Difference]: With dead ends: 112 [2022-04-06 19:47:32,071 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 19:47:32,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3050, Invalid=17830, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 19:47:32,072 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 101 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4451 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 4546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:32,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 183 Invalid, 4546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4451 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 19:47:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 19:47:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-04-06 19:47:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2022-04-06 19:47:32,100 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2022-04-06 19:47:32,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:32,115 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2022-04-06 19:47:32,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:32,115 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2022-04-06 19:47:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 19:47:32,116 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:32,116 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:32,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:32,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-04-06 19:47:32,331 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash 520147099, now seen corresponding path program 93 times [2022-04-06 19:47:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [588017829] [2022-04-06 19:47:32,333 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:32,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:32,333 INFO L85 PathProgramCache]: Analyzing trace with hash 520147099, now seen corresponding path program 94 times [2022-04-06 19:47:32,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:32,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882662708] [2022-04-06 19:47:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:32,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:33,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:33,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882662708] [2022-04-06 19:47:33,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882662708] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837887522] [2022-04-06 19:47:33,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:33,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:33,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:33,043 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:33,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 19:47:33,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:33,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:33,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 19:47:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:34,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-04-06 19:47:34,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837887522] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:34,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:34,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52, 6] total 102 [2022-04-06 19:47:34,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:34,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [588017829] [2022-04-06 19:47:34,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [588017829] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:34,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:34,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 19:47:34,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827229943] [2022-04-06 19:47:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:34,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 19:47:34,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:34,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 19:47:34,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=9820, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 19:47:34,988 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:36,701 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-04-06 19:47:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 19:47:36,701 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-04-06 19:47:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:36,702 INFO L225 Difference]: With dead ends: 114 [2022-04-06 19:47:36,702 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 19:47:36,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4750 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=815, Invalid=21535, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 19:47:36,704 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4553 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 4650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 4553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:36,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 98 Invalid, 4650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 4553 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:47:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 19:47:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-04-06 19:47:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2022-04-06 19:47:36,730 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2022-04-06 19:47:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:36,731 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2022-04-06 19:47:36,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2022-04-06 19:47:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 19:47:36,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:36,731 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:36,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:36,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-04-06 19:47:36,947 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:36,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:36,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1607845288, now seen corresponding path program 95 times [2022-04-06 19:47:36,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:36,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1322536693] [2022-04-06 19:47:36,949 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:36,949 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:36,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1607845288, now seen corresponding path program 96 times [2022-04-06 19:47:36,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:36,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193791872] [2022-04-06 19:47:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:36,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:37,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:37,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:37,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193791872] [2022-04-06 19:47:37,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193791872] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:37,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095975015] [2022-04-06 19:47:37,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:37,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:37,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:37,638 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:37,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 19:47:42,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-04-06 19:47:42,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:42,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 19:47:42,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:43,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:47,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095975015] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:47,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:47,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 54] total 129 [2022-04-06 19:47:47,496 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:47,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1322536693] [2022-04-06 19:47:47,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1322536693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:47,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:47,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 19:47:47,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556985214] [2022-04-06 19:47:47,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:47,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 19:47:47,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 19:47:47,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3728, Invalid=12784, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 19:47:47,497 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:49,353 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-04-06 19:47:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 19:47:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-04-06 19:47:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:49,353 INFO L225 Difference]: With dead ends: 116 [2022-04-06 19:47:49,353 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 19:47:49,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5829 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6121, Invalid=25385, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 19:47:49,356 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4684 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:49,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 38 Invalid, 4783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4684 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:47:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 19:47:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-04-06 19:47:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2022-04-06 19:47:49,379 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2022-04-06 19:47:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:49,379 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2022-04-06 19:47:49,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2022-04-06 19:47:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 19:47:49,380 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:49,380 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:49,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:49,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:49,585 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2090870997, now seen corresponding path program 97 times [2022-04-06 19:47:49,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:49,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182114662] [2022-04-06 19:47:49,586 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:49,586 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:49,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2090870997, now seen corresponding path program 98 times [2022-04-06 19:47:49,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:49,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738736669] [2022-04-06 19:47:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:49,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:50,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:50,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738736669] [2022-04-06 19:47:50,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738736669] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:50,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129780443] [2022-04-06 19:47:50,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:50,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:50,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:50,553 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:50,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 19:47:50,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:50,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 19:47:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:50,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:52,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129780443] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:52,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:52,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-04-06 19:47:52,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:52,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182114662] [2022-04-06 19:47:52,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182114662] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:52,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:52,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 19:47:52,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810238626] [2022-04-06 19:47:52,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:52,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 19:47:52,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:52,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 19:47:52,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1531, Invalid=9181, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 19:47:52,934 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:55,142 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-04-06 19:47:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 19:47:55,143 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-04-06 19:47:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:55,143 INFO L225 Difference]: With dead ends: 118 [2022-04-06 19:47:55,143 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 19:47:55,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3104, Invalid=20458, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 19:47:55,144 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4919 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 5020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:55,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 78 Invalid, 5020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4919 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:47:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 19:47:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-04-06 19:47:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2022-04-06 19:47:55,168 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2022-04-06 19:47:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:55,169 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2022-04-06 19:47:55,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2022-04-06 19:47:55,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 19:47:55,169 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:55,169 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:55,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:55,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:55,386 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:55,386 INFO L85 PathProgramCache]: Analyzing trace with hash 324299794, now seen corresponding path program 99 times [2022-04-06 19:47:55,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:55,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1311794557] [2022-04-06 19:47:55,387 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:55,387 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash 324299794, now seen corresponding path program 100 times [2022-04-06 19:47:55,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:55,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341636848] [2022-04-06 19:47:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:55,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:55,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2022-04-06 19:47:55,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:55,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341636848] [2022-04-06 19:47:55,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341636848] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:55,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966269235] [2022-04-06 19:47:55,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:55,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:55,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:55,914 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:55,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 19:47:55,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:55,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 106 conjunts are in the unsatisfiable core [2022-04-06 19:47:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:47:57,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2022-04-06 19:47:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966269235] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:58,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 55, 7] total 62 [2022-04-06 19:47:58,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1311794557] [2022-04-06 19:47:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1311794557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:58,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:47:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099659719] [2022-04-06 19:47:58,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:58,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:47:58,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:47:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3452, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:47:58,286 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:58,414 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-04-06 19:47:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:47:58,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-04-06 19:47:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:58,415 INFO L225 Difference]: With dead ends: 112 [2022-04-06 19:47:58,415 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 19:47:58,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 119 SyntacticMatches, 99 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5624 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=353, Invalid=3937, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:47:58,417 INFO L913 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:58,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:47:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 19:47:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 19:47:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 19:47:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 19:47:58,418 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 111 [2022-04-06 19:47:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:58,418 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 19:47:58,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 19:47:58,418 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 19:47:58,420 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 19:47:58,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 19:47:58,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 19:47:58,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.