/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:35:52,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:35:52,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:35:52,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 20:35:52,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 20:35:52,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 20:35:52,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 20:35:52,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 20:35:52,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 20:35:52,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 20:35:52,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 20:35:52,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 20:35:52,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 20:35:52,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 20:35:52,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 20:35:52,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 20:35:52,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 20:35:52,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 20:35:52,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 20:35:52,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 20:35:52,672 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 20:35:52,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 20:35:52,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 20:35:52,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 20:35:52,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 20:35:52,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 20:35:52,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 20:35:52,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 20:35:52,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 20:35:52,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 20:35:52,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 20:35:52,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 20:35:52,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 20:35:52,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 20:35:52,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 20:35:52,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 20:35:52,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 20:35:52,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 20:35:52,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 20:35:52,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:35:52,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:35:52,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:35:52,685 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 20:35:52,694 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:35:52,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:35:52,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:35:52,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:35:52,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:35:52,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:35:52,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:35:52,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:35:52,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:35:52,696 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:35:52,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:35:52,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:35:52,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:35:52,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:35:52,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:35:52,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:35:52,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:35:52,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:35:52,697 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:35:52,697 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:35:52,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:35:52,697 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:35:52,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:35:52,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:35:52,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:35:52,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:35:52,911 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:35:52,911 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:35:52,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c [2022-04-06 20:35:52,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e623a6e/72ec7fce28454f62b1a37abffd96b010/FLAGa966d9c14 [2022-04-06 20:35:53,295 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:35:53,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de41.c [2022-04-06 20:35:53,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e623a6e/72ec7fce28454f62b1a37abffd96b010/FLAGa966d9c14 [2022-04-06 20:35:53,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e623a6e/72ec7fce28454f62b1a37abffd96b010 [2022-04-06 20:35:53,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:35:53,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:35:53,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:35:53,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:35:53,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:35:53,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:35:53" (1/1) ... [2022-04-06 20:35:53,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8b1131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53, skipping insertion in model container [2022-04-06 20:35:53,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:35:53" (1/1) ... [2022-04-06 20:35:53,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:35:53,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:35:53,485 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de41.c[368,381] [2022-04-06 20:35:53,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:35:53,504 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:35:53,513 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de41.c[368,381] [2022-04-06 20:35:53,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:35:53,525 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:35:53,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53 WrapperNode [2022-04-06 20:35:53,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:35:53,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:35:53,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:35:53,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:35:53,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53" (1/1) ... [2022-04-06 20:35:53,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53" (1/1) ... [2022-04-06 20:35:53,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53" (1/1) ... [2022-04-06 20:35:53,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53" (1/1) ... [2022-04-06 20:35:53,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53" (1/1) ... [2022-04-06 20:35:53,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53" (1/1) ... [2022-04-06 20:35:53,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53" (1/1) ... [2022-04-06 20:35:53,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:35:53,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:35:53,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:35:53,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:35:53,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53" (1/1) ... [2022-04-06 20:35:53,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:35:53,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:53,583 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 20:35:53,602 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 20:35:53,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:35:53,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:35:53,617 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:35:53,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:35:53,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:35:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:35:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:35:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:35:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:35:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 20:35:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:35:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:35:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:35:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:35:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:35:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:35:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:35:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:35:53,660 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:35:53,661 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:35:53,741 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:35:53,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:35:53,744 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-04-06 20:35:53,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:35:53 BoogieIcfgContainer [2022-04-06 20:35:53,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:35:53,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:35:53,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:35:53,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:35:53,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:35:53" (1/3) ... [2022-04-06 20:35:53,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8128994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:35:53, skipping insertion in model container [2022-04-06 20:35:53,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:35:53" (2/3) ... [2022-04-06 20:35:53,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8128994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:35:53, skipping insertion in model container [2022-04-06 20:35:53,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:35:53" (3/3) ... [2022-04-06 20:35:53,750 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de41.c [2022-04-06 20:35:53,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:35:53,753 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:35:53,784 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:35:53,791 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 20:35:53,792 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:35:53,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 20:35:53,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:35:53,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:53,809 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:53,810 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:53,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2066875484, now seen corresponding path program 1 times [2022-04-06 20:35:53,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:53,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1795988463] [2022-04-06 20:35:53,827 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:35:53,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2066875484, now seen corresponding path program 2 times [2022-04-06 20:35:53,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:53,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131478642] [2022-04-06 20:35:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:53,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:53,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:53,985 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 20:35:53,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:53,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131478642] [2022-04-06 20:35:53,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131478642] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:53,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:53,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:35:53,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:53,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1795988463] [2022-04-06 20:35:53,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1795988463] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:53,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:53,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:35:53,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328462373] [2022-04-06 20:35:53,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:53,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:35:53,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:35:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:35:54,007 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:54,030 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-04-06 20:35:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:35:54,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 20:35:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:54,035 INFO L225 Difference]: With dead ends: 39 [2022-04-06 20:35:54,035 INFO L226 Difference]: Without dead ends: 16 [2022-04-06 20:35:54,036 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 20:35:54,038 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 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 20:35:54,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:35:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-06 20:35:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-06 20:35:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 20:35:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-04-06 20:35:54,063 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 15 [2022-04-06 20:35:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:54,063 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-04-06 20:35:54,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-04-06 20:35:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:35:54,064 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:54,064 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:54,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:35:54,065 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:54,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2063181400, now seen corresponding path program 1 times [2022-04-06 20:35:54,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:54,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [578896038] [2022-04-06 20:35:54,066 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:35:54,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2063181400, now seen corresponding path program 2 times [2022-04-06 20:35:54,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:54,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194416848] [2022-04-06 20:35:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:54,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:54,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:54,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194416848] [2022-04-06 20:35:54,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194416848] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:54,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:54,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:35:54,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:54,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [578896038] [2022-04-06 20:35:54,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [578896038] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:54,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:54,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:35:54,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157183465] [2022-04-06 20:35:54,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:54,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:35:54,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:35:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:35:54,318 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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 20:35:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:54,450 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-04-06 20:35:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:35:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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 20:35:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:54,451 INFO L225 Difference]: With dead ends: 35 [2022-04-06 20:35:54,451 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 20:35:54,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:35:54,453 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:54,453 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 33 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:35:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 20:35:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 20:35:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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 20:35:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-04-06 20:35:54,459 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2022-04-06 20:35:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:54,460 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-04-06 20:35:54,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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 20:35:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-04-06 20:35:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:35:54,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:54,460 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:54,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:35:54,461 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:54,461 INFO L85 PathProgramCache]: Analyzing trace with hash 570818913, now seen corresponding path program 1 times [2022-04-06 20:35:54,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:54,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [294448242] [2022-04-06 20:35:54,470 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:54,471 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:54,471 INFO L85 PathProgramCache]: Analyzing trace with hash 570818913, now seen corresponding path program 2 times [2022-04-06 20:35:54,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:54,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063966358] [2022-04-06 20:35:54,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:54,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:54,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:54,567 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 20:35:54,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:54,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063966358] [2022-04-06 20:35:54,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063966358] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524497175] [2022-04-06 20:35:54,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:54,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:54,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:54,570 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 20:35:54,571 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 20:35:54,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:54,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:54,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:35:54,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:54,675 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 20:35:54,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:54,724 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 20:35:54,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524497175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:54,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:54,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:35:54,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:54,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [294448242] [2022-04-06 20:35:54,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [294448242] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:54,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:54,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:35:54,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768212875] [2022-04-06 20:35:54,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:54,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:35:54,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:54,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:35:54,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:35:54,727 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 20:35:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:54,800 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-04-06 20:35:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:35:54,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 16 [2022-04-06 20:35:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:54,802 INFO L225 Difference]: With dead ends: 39 [2022-04-06 20:35:54,802 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:35:54,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:35:54,804 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:54,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 35 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:35:54,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:35:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-04-06 20:35:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 20:35:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-04-06 20:35:54,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 16 [2022-04-06 20:35:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:54,811 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-04-06 20:35:54,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 20:35:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-04-06 20:35:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:35:54,811 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:54,811 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:54,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:55,030 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 20:35:55,031 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:55,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash -417354376, now seen corresponding path program 1 times [2022-04-06 20:35:55,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:55,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960763647] [2022-04-06 20:35:55,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:55,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash -417354376, now seen corresponding path program 2 times [2022-04-06 20:35:55,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:55,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722484011] [2022-04-06 20:35:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:55,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:35:55,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:55,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722484011] [2022-04-06 20:35:55,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722484011] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:55,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:55,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:35:55,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960763647] [2022-04-06 20:35:55,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960763647] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:55,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:55,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:35:55,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16442419] [2022-04-06 20:35:55,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:55,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:35:55,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:55,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:35:55,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:35:55,096 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 20:35:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:55,152 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-04-06 20:35:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:35:55,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 20:35:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:55,154 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:35:55,154 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:35:55,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:35:55,155 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:55,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:35:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:35:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 20:35:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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 20:35:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-04-06 20:35:55,159 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 17 [2022-04-06 20:35:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:55,159 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-04-06 20:35:55,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 20:35:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-04-06 20:35:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:35:55,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:55,160 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:55,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:35:55,160 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1552222072, now seen corresponding path program 3 times [2022-04-06 20:35:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:55,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1678273121] [2022-04-06 20:35:55,162 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:55,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1552222072, now seen corresponding path program 4 times [2022-04-06 20:35:55,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:55,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351614351] [2022-04-06 20:35:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:55,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:55,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:55,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:55,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351614351] [2022-04-06 20:35:55,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351614351] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:55,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66130185] [2022-04-06 20:35:55,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:55,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:55,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:55,257 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 20:35:55,258 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 20:35:55,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:55,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:35:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:55,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:55,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66130185] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:55,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:55,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 20:35:55,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:55,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1678273121] [2022-04-06 20:35:55,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1678273121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:55,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:55,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:35:55,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76174106] [2022-04-06 20:35:55,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:55,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:35:55,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:55,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:35:55,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:35:55,413 INFO L87 Difference]: Start difference. First operand 23 states and 28 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 20:35:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:55,513 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2022-04-06 20:35:55,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:35:55,513 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 20:35:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:55,514 INFO L225 Difference]: With dead ends: 43 [2022-04-06 20:35:55,514 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:35:55,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:35:55,521 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:55,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:35:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:35:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2022-04-06 20:35:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 20:35:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-04-06 20:35:55,534 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2022-04-06 20:35:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:55,535 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-04-06 20:35:55,535 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 20:35:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-04-06 20:35:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:35:55,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:55,537 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:55,553 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 20:35:55,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:55,745 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1344200880, now seen corresponding path program 1 times [2022-04-06 20:35:55,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:55,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2065883056] [2022-04-06 20:35:55,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:55,747 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1344200880, now seen corresponding path program 2 times [2022-04-06 20:35:55,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:55,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646583037] [2022-04-06 20:35:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:55,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:55,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:35:55,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:55,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646583037] [2022-04-06 20:35:55,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646583037] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:55,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455519724] [2022-04-06 20:35:55,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:55,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:55,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:55,796 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 20:35:55,797 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 20:35:55,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:55,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:55,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:35:55,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:35:55,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:35:56,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455519724] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:56,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:56,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 15 [2022-04-06 20:35:56,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:56,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2065883056] [2022-04-06 20:35:56,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2065883056] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:56,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:56,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:35:56,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458990183] [2022-04-06 20:35:56,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:56,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:35:56,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:56,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:35:56,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:35:56,094 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:56,163 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-04-06 20:35:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:35:56,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 20:35:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:56,165 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:35:56,165 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 20:35:56,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:35:56,168 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:56,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:35:56,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 20:35:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-04-06 20:35:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 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 20:35:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-04-06 20:35:56,175 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 18 [2022-04-06 20:35:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:56,175 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-04-06 20:35:56,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-04-06 20:35:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:35:56,175 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:56,176 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:56,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:56,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:56,392 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:56,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1910948929, now seen corresponding path program 5 times [2022-04-06 20:35:56,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:56,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1221827174] [2022-04-06 20:35:56,394 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:56,394 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:56,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1910948929, now seen corresponding path program 6 times [2022-04-06 20:35:56,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:56,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747052693] [2022-04-06 20:35:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:56,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:56,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:56,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:56,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747052693] [2022-04-06 20:35:56,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747052693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:56,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33092776] [2022-04-06 20:35:56,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:56,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:56,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:56,479 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 20:35:56,479 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 20:35:56,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:35:56,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:56,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:35:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:56,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:56,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33092776] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:56,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:56,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 20:35:56,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:56,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1221827174] [2022-04-06 20:35:56,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1221827174] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:56,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:56,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:35:56,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450411260] [2022-04-06 20:35:56,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:56,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:35:56,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:56,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:35:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:35:56,627 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:56,763 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-04-06 20:35:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:35:56,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 20:35:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:56,764 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:35:56,765 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 20:35:56,765 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:35:56,765 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:56,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 52 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:35:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 20:35:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2022-04-06 20:35:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 39 states have internal predecessors, (55), 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 20:35:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2022-04-06 20:35:56,772 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 18 [2022-04-06 20:35:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:56,773 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2022-04-06 20:35:56,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2022-04-06 20:35:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:35:56,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:56,773 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:56,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:56,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:56,987 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:56,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1244950584, now seen corresponding path program 1 times [2022-04-06 20:35:56,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:56,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [330668118] [2022-04-06 20:35:56,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:56,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:56,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1244950584, now seen corresponding path program 2 times [2022-04-06 20:35:56,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:56,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459598151] [2022-04-06 20:35:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:56,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:57,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:57,173 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 20:35:57,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:57,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459598151] [2022-04-06 20:35:57,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459598151] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:57,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146072566] [2022-04-06 20:35:57,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:57,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:57,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:57,176 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 20:35:57,177 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 20:35:57,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:57,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:57,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:35:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:57,438 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 20:35:57,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:57,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146072566] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:57,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:57,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 23 [2022-04-06 20:35:57,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:57,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [330668118] [2022-04-06 20:35:57,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [330668118] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:57,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:57,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:35:57,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431198424] [2022-04-06 20:35:57,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:57,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:35:57,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:57,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:35:57,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:35:57,696 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 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 20:35:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:57,878 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-04-06 20:35:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:35:57,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 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 20:35:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:57,879 INFO L225 Difference]: With dead ends: 57 [2022-04-06 20:35:57,879 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:35:57,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:35:57,880 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:57,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:35:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:35:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-04-06 20:35:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 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 20:35:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-04-06 20:35:57,893 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 19 [2022-04-06 20:35:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:57,893 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-04-06 20:35:57,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 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 20:35:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-04-06 20:35:57,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:35:57,898 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:57,898 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:57,916 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 20:35:58,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:58,116 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:58,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:58,117 INFO L85 PathProgramCache]: Analyzing trace with hash -343761690, now seen corresponding path program 3 times [2022-04-06 20:35:58,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:58,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1053500386] [2022-04-06 20:35:58,118 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:58,119 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash -343761690, now seen corresponding path program 4 times [2022-04-06 20:35:58,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:58,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802711257] [2022-04-06 20:35:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:58,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:58,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:35:58,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:58,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802711257] [2022-04-06 20:35:58,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802711257] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:58,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257612071] [2022-04-06 20:35:58,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:58,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:58,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:58,166 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 20:35:58,167 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 20:35:58,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:58,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:58,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:35:58,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:35:58,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:35:58,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257612071] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:58,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:58,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-04-06 20:35:58,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1053500386] [2022-04-06 20:35:58,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1053500386] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:58,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:58,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:35:58,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756495716] [2022-04-06 20:35:58,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:58,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:35:58,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:58,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:35:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:35:58,309 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 20:35:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:58,394 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2022-04-06 20:35:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:35:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 20:35:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:58,395 INFO L225 Difference]: With dead ends: 60 [2022-04-06 20:35:58,395 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:35:58,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:35:58,396 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:58,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 36 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:35:58,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:35:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-04-06 20:35:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 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 20:35:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-04-06 20:35:58,412 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 19 [2022-04-06 20:35:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:58,413 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-04-06 20:35:58,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 20:35:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-04-06 20:35:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:35:58,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:58,415 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:58,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:58,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:58,631 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash 146579608, now seen corresponding path program 7 times [2022-04-06 20:35:58,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:58,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89530522] [2022-04-06 20:35:58,633 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:58,633 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:58,633 INFO L85 PathProgramCache]: Analyzing trace with hash 146579608, now seen corresponding path program 8 times [2022-04-06 20:35:58,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:58,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926755119] [2022-04-06 20:35:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:58,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:58,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:58,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:58,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926755119] [2022-04-06 20:35:58,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926755119] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:58,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533589131] [2022-04-06 20:35:58,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:58,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:58,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:58,707 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 20:35:58,708 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 20:35:58,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:35:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:58,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:58,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533589131] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:58,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:58,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:35:58,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:58,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89530522] [2022-04-06 20:35:58,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89530522] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:58,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:58,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:35:58,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764721837] [2022-04-06 20:35:58,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:58,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:35:58,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:58,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:35:58,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:35:58,869 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 20:35:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:59,039 INFO L93 Difference]: Finished difference Result 82 states and 116 transitions. [2022-04-06 20:35:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:35:59,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 20:35:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:59,040 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:35:59,040 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 20:35:59,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:35:59,041 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:59,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 62 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:35:59,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 20:35:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2022-04-06 20:35:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 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 20:35:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2022-04-06 20:35:59,066 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 19 [2022-04-06 20:35:59,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:59,067 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2022-04-06 20:35:59,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 20:35:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2022-04-06 20:35:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:35:59,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:59,067 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:59,089 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 20:35:59,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:59,284 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:59,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:59,284 INFO L85 PathProgramCache]: Analyzing trace with hash 95732656, now seen corresponding path program 3 times [2022-04-06 20:35:59,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:59,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [683784230] [2022-04-06 20:35:59,285 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:59,285 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:59,285 INFO L85 PathProgramCache]: Analyzing trace with hash 95732656, now seen corresponding path program 4 times [2022-04-06 20:35:59,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:59,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780862163] [2022-04-06 20:35:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:59,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:59,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:35:59,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:59,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780862163] [2022-04-06 20:35:59,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780862163] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:59,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937283290] [2022-04-06 20:35:59,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:59,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:59,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:59,334 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 20:35:59,335 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 20:35:59,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:59,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:59,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:35:59,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:35:59,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:35:59,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937283290] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:59,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:59,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-04-06 20:35:59,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:59,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [683784230] [2022-04-06 20:35:59,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [683784230] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:59,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:59,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:35:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540338133] [2022-04-06 20:35:59,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:59,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:35:59,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:35:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:35:59,425 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 20:35:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:59,466 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-04-06 20:35:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:35:59,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:35:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:59,466 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:35:59,466 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:35:59,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:35:59,468 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:59,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:35:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:35:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-04-06 20:35:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 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 20:35:59,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-04-06 20:35:59,480 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 20 [2022-04-06 20:35:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:59,480 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-04-06 20:35:59,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 20:35:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-04-06 20:35:59,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:35:59,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:59,481 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:59,509 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 20:35:59,695 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,SelfDestructingSolverStorable10 [2022-04-06 20:35:59,696 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1285705505, now seen corresponding path program 9 times [2022-04-06 20:35:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [383171856] [2022-04-06 20:35:59,697 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:59,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1285705505, now seen corresponding path program 10 times [2022-04-06 20:35:59,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:59,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623916745] [2022-04-06 20:35:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:59,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:59,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:59,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:59,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623916745] [2022-04-06 20:35:59,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623916745] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:59,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168802886] [2022-04-06 20:35:59,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:59,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:59,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:59,770 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 20:35:59,771 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 20:35:59,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:59,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:35:59,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:59,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:59,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168802886] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:59,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:59,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:35:59,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:59,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [383171856] [2022-04-06 20:35:59,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [383171856] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:59,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:59,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:35:59,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775700152] [2022-04-06 20:35:59,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:59,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:35:59,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:59,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:35:59,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:35:59,963 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 20:36:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:00,175 INFO L93 Difference]: Finished difference Result 91 states and 132 transitions. [2022-04-06 20:36:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:36:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:36:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:00,176 INFO L225 Difference]: With dead ends: 91 [2022-04-06 20:36:00,176 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:36:00,176 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:36:00,177 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:00,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 69 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:36:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2022-04-06 20:36:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 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 20:36:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2022-04-06 20:36:00,184 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 20 [2022-04-06 20:36:00,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:00,184 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2022-04-06 20:36:00,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 20:36:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2022-04-06 20:36:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:36:00,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:00,184 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:00,202 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 20:36:00,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:00,399 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1586904504, now seen corresponding path program 5 times [2022-04-06 20:36:00,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:00,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [937658423] [2022-04-06 20:36:00,401 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:00,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1586904504, now seen corresponding path program 6 times [2022-04-06 20:36:00,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:00,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154285794] [2022-04-06 20:36:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:00,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:00,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:36:00,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154285794] [2022-04-06 20:36:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154285794] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287417738] [2022-04-06 20:36:00,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:00,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:00,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:00,455 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 20:36:00,457 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 20:36:00,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 20:36:00,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:00,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:36:00,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:36:00,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:36:00,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287417738] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:00,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:00,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-04-06 20:36:00,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:00,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [937658423] [2022-04-06 20:36:00,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [937658423] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:00,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:00,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:36:00,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449086393] [2022-04-06 20:36:00,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:00,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:36:00,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:00,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:36:00,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:36:00,598 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 20:36:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:00,717 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2022-04-06 20:36:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:36:00,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have 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 20:36:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:00,718 INFO L225 Difference]: With dead ends: 75 [2022-04-06 20:36:00,718 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:36:00,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:36:00,719 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:00,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:36:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2022-04-06 20:36:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 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 20:36:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2022-04-06 20:36:00,728 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 21 [2022-04-06 20:36:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:00,728 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2022-04-06 20:36:00,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 20:36:00,728 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2022-04-06 20:36:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:36:00,730 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:00,730 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:00,748 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 20:36:00,945 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,SelfDestructingSolverStorable12 [2022-04-06 20:36:00,946 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:00,946 INFO L85 PathProgramCache]: Analyzing trace with hash 323810136, now seen corresponding path program 5 times [2022-04-06 20:36:00,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:00,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [321755640] [2022-04-06 20:36:00,947 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:00,947 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:00,947 INFO L85 PathProgramCache]: Analyzing trace with hash 323810136, now seen corresponding path program 6 times [2022-04-06 20:36:00,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:00,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196530818] [2022-04-06 20:36:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:00,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:00,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:00,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:00,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196530818] [2022-04-06 20:36:00,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196530818] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:00,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701916594] [2022-04-06 20:36:00,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:00,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:00,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:01,000 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 20:36:01,001 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 20:36:01,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 20:36:01,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:36:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:01,162 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 20:36:01,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:01,317 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 20:36:01,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701916594] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:01,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:01,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-04-06 20:36:01,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:01,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [321755640] [2022-04-06 20:36:01,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [321755640] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:01,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:01,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:36:01,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115128749] [2022-04-06 20:36:01,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:01,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:36:01,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:01,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:36:01,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:36:01,319 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 20:36:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:01,425 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2022-04-06 20:36:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:36:01,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have 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 20:36:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:01,426 INFO L225 Difference]: With dead ends: 77 [2022-04-06 20:36:01,426 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:36:01,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:36:01,427 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:01,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 43 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:36:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-04-06 20:36:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 65 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 20:36:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2022-04-06 20:36:01,436 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 21 [2022-04-06 20:36:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:01,436 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2022-04-06 20:36:01,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 3 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 20:36:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2022-04-06 20:36:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:36:01,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:01,437 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:01,453 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 20:36:01,651 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,SelfDestructingSolverStorable13 [2022-04-06 20:36:01,651 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2056097352, now seen corresponding path program 11 times [2022-04-06 20:36:01,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:01,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1136017497] [2022-04-06 20:36:01,653 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:01,653 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2056097352, now seen corresponding path program 12 times [2022-04-06 20:36:01,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:01,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046900049] [2022-04-06 20:36:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:01,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:01,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:01,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:01,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046900049] [2022-04-06 20:36:01,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046900049] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:01,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569059813] [2022-04-06 20:36:01,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:01,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:01,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:01,731 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 20:36:01,732 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 20:36:01,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:36:01,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:01,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:36:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:01,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:01,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569059813] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:01,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:01,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 20:36:01,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:01,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1136017497] [2022-04-06 20:36:01,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1136017497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:01,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:01,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:36:01,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791679341] [2022-04-06 20:36:01,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:01,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:36:01,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:36:01,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:36:01,935 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 20:36:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:02,205 INFO L93 Difference]: Finished difference Result 129 states and 190 transitions. [2022-04-06 20:36:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:36:02,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 20:36:02,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:02,206 INFO L225 Difference]: With dead ends: 129 [2022-04-06 20:36:02,206 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 20:36:02,207 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:36:02,207 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 62 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:02,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 79 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 20:36:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2022-04-06 20:36:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.3918918918918919) internal successors, (103), 74 states have internal predecessors, (103), 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 20:36:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 107 transitions. [2022-04-06 20:36:02,217 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 107 transitions. Word has length 21 [2022-04-06 20:36:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:02,217 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 107 transitions. [2022-04-06 20:36:02,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 20:36:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 107 transitions. [2022-04-06 20:36:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:36:02,217 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:02,218 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:02,236 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 20:36:02,431 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,SelfDestructingSolverStorable14 [2022-04-06 20:36:02,431 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:02,432 INFO L85 PathProgramCache]: Analyzing trace with hash 219580352, now seen corresponding path program 7 times [2022-04-06 20:36:02,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:02,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499293230] [2022-04-06 20:36:02,433 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:02,433 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:02,433 INFO L85 PathProgramCache]: Analyzing trace with hash 219580352, now seen corresponding path program 8 times [2022-04-06 20:36:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:02,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167245644] [2022-04-06 20:36:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:02,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:02,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:02,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167245644] [2022-04-06 20:36:02,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167245644] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:02,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357729551] [2022-04-06 20:36:02,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:02,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:02,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:02,512 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 20:36:02,513 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 20:36:02,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:02,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:02,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:36:02,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:02,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:02,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357729551] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:02,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:02,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-04-06 20:36:02,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:02,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499293230] [2022-04-06 20:36:02,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499293230] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:02,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:02,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:36:02,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130908374] [2022-04-06 20:36:02,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:02,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:36:02,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:02,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:36:02,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:36:02,703 INFO L87 Difference]: Start difference. First operand 79 states and 107 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 20:36:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:02,860 INFO L93 Difference]: Finished difference Result 97 states and 127 transitions. [2022-04-06 20:36:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:36:02,860 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 22 [2022-04-06 20:36:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:02,861 INFO L225 Difference]: With dead ends: 97 [2022-04-06 20:36:02,861 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 20:36:02,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:36:02,862 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:02,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 46 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 20:36:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2022-04-06 20:36:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.36986301369863) internal successors, (100), 73 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 20:36:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2022-04-06 20:36:02,871 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 22 [2022-04-06 20:36:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:02,871 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2022-04-06 20:36:02,871 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 20:36:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2022-04-06 20:36:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:36:02,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:02,872 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:02,888 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 20:36:03,087 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,SelfDestructingSolverStorable15 [2022-04-06 20:36:03,087 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1722196481, now seen corresponding path program 13 times [2022-04-06 20:36:03,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:03,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1787367110] [2022-04-06 20:36:03,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:03,089 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1722196481, now seen corresponding path program 14 times [2022-04-06 20:36:03,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:03,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127437268] [2022-04-06 20:36:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:03,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:03,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:03,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:03,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127437268] [2022-04-06 20:36:03,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127437268] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:03,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368507822] [2022-04-06 20:36:03,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:03,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:03,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:03,178 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 20:36:03,179 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 20:36:03,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:03,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:03,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:36:03,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:03,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:03,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368507822] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:03,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:03,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:36:03,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:03,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1787367110] [2022-04-06 20:36:03,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1787367110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:03,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:03,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:36:03,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236519218] [2022-04-06 20:36:03,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:03,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:36:03,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:03,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:36:03,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:36:03,415 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:03,742 INFO L93 Difference]: Finished difference Result 142 states and 209 transitions. [2022-04-06 20:36:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:36:03,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 20:36:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:03,743 INFO L225 Difference]: With dead ends: 142 [2022-04-06 20:36:03,743 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 20:36:03,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:36:03,744 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 72 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:03,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 89 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 20:36:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2022-04-06 20:36:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.3780487804878048) internal successors, (113), 82 states have internal predecessors, (113), 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 20:36:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2022-04-06 20:36:03,755 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 22 [2022-04-06 20:36:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:03,755 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2022-04-06 20:36:03,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2022-04-06 20:36:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:36:03,755 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:03,755 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:03,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:03,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:03,971 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:03,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1247228840, now seen corresponding path program 7 times [2022-04-06 20:36:03,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:03,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [167153378] [2022-04-06 20:36:03,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:03,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:03,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1247228840, now seen corresponding path program 8 times [2022-04-06 20:36:03,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:03,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930004239] [2022-04-06 20:36:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:03,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:04,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:04,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:04,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930004239] [2022-04-06 20:36:04,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930004239] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:04,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932633547] [2022-04-06 20:36:04,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:04,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:04,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:04,236 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 20:36:04,237 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 20:36:04,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:04,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:04,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:36:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:04,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:04,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932633547] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:04,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:04,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2022-04-06 20:36:04,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:04,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [167153378] [2022-04-06 20:36:04,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [167153378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:04,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:04,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:36:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677468831] [2022-04-06 20:36:04,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:04,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:36:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:36:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:36:04,797 INFO L87 Difference]: Start difference. First operand 87 states and 117 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:05,031 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2022-04-06 20:36:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:36:05,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:36:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:05,032 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:36:05,032 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 20:36:05,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:36:05,032 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:05,033 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 54 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 20:36:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2022-04-06 20:36:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.3604651162790697) internal successors, (117), 86 states have internal predecessors, (117), 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 20:36:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2022-04-06 20:36:05,045 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 23 [2022-04-06 20:36:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:05,045 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 121 transitions. [2022-04-06 20:36:05,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:05,045 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 121 transitions. [2022-04-06 20:36:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:36:05,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:05,045 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:05,064 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 20:36:05,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:36:05,259 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash -610073592, now seen corresponding path program 9 times [2022-04-06 20:36:05,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:05,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676478573] [2022-04-06 20:36:05,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:05,261 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash -610073592, now seen corresponding path program 10 times [2022-04-06 20:36:05,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:05,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994531210] [2022-04-06 20:36:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:05,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:36:05,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:05,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994531210] [2022-04-06 20:36:05,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994531210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:05,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355726648] [2022-04-06 20:36:05,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:05,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:05,315 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 20:36:05,316 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 20:36:05,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:05,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:05,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:36:05,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:36:05,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:36:05,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355726648] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:05,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:05,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 15 [2022-04-06 20:36:05,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:05,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676478573] [2022-04-06 20:36:05,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676478573] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:05,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:05,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:36:05,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765359968] [2022-04-06 20:36:05,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:05,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:36:05,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:05,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:36:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:36:05,471 INFO L87 Difference]: Start difference. First operand 91 states and 121 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 20:36:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:05,645 INFO L93 Difference]: Finished difference Result 122 states and 155 transitions. [2022-04-06 20:36:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:36:05,646 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 23 [2022-04-06 20:36:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:05,646 INFO L225 Difference]: With dead ends: 122 [2022-04-06 20:36:05,647 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 20:36:05,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:36:05,647 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:05,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 55 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 20:36:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2022-04-06 20:36:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.3488372093023255) internal successors, (116), 86 states have internal predecessors, (116), 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 20:36:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2022-04-06 20:36:05,659 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 23 [2022-04-06 20:36:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:05,659 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2022-04-06 20:36:05,659 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 20:36:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2022-04-06 20:36:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:36:05,660 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:05,660 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:05,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 20:36:05,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:05,868 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1409778984, now seen corresponding path program 15 times [2022-04-06 20:36:05,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:05,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1174465232] [2022-04-06 20:36:05,869 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:05,869 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1409778984, now seen corresponding path program 16 times [2022-04-06 20:36:05,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:05,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799888889] [2022-04-06 20:36:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:05,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:05,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:05,980 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 20:36:05,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:05,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799888889] [2022-04-06 20:36:05,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799888889] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:05,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846606761] [2022-04-06 20:36:05,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:05,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:05,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:05,982 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 20:36:05,982 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 20:36:06,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:06,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:36:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:06,075 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 20:36:06,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:06,251 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 20:36:06,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846606761] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:06,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:06,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:36:06,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:06,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1174465232] [2022-04-06 20:36:06,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1174465232] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:06,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:06,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:36:06,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121207062] [2022-04-06 20:36:06,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:06,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:36:06,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:36:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:36:06,252 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 20:36:06,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:06,657 INFO L93 Difference]: Finished difference Result 162 states and 236 transitions. [2022-04-06 20:36:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:36:06,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 20:36:06,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:06,658 INFO L225 Difference]: With dead ends: 162 [2022-04-06 20:36:06,658 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 20:36:06,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:36:06,658 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 81 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:06,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 99 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 20:36:06,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2022-04-06 20:36:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 95 states have internal predecessors, (129), 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 20:36:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 133 transitions. [2022-04-06 20:36:06,670 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 133 transitions. Word has length 23 [2022-04-06 20:36:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:06,671 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 133 transitions. [2022-04-06 20:36:06,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 20:36:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 133 transitions. [2022-04-06 20:36:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:36:06,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:06,671 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:06,695 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 20:36:06,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:06,887 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:06,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:06,887 INFO L85 PathProgramCache]: Analyzing trace with hash 25106720, now seen corresponding path program 11 times [2022-04-06 20:36:06,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:06,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2134443401] [2022-04-06 20:36:06,888 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:06,888 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash 25106720, now seen corresponding path program 12 times [2022-04-06 20:36:06,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:06,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482397895] [2022-04-06 20:36:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:06,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:06,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:06,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482397895] [2022-04-06 20:36:06,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482397895] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710651728] [2022-04-06 20:36:06,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:06,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:06,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:06,937 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 20:36:06,939 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 20:36:06,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:06,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:36:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:07,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:07,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710651728] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:07,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:07,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-04-06 20:36:07,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:07,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2134443401] [2022-04-06 20:36:07,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2134443401] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:07,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:07,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:36:07,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924732087] [2022-04-06 20:36:07,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:07,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:36:07,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:07,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:36:07,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:36:07,040 INFO L87 Difference]: Start difference. First operand 100 states and 133 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:07,120 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2022-04-06 20:36:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:36:07,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:36:07,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:07,121 INFO L225 Difference]: With dead ends: 109 [2022-04-06 20:36:07,121 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 20:36:07,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:36:07,121 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:07,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:07,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 20:36:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2022-04-06 20:36:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 86 states have internal predecessors, (119), 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 20:36:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2022-04-06 20:36:07,154 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 24 [2022-04-06 20:36:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:07,154 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2022-04-06 20:36:07,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2022-04-06 20:36:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:36:07,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:07,154 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:07,170 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 20:36:07,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:07,363 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1347388208, now seen corresponding path program 9 times [2022-04-06 20:36:07,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:07,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954714910] [2022-04-06 20:36:07,364 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:07,364 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1347388208, now seen corresponding path program 10 times [2022-04-06 20:36:07,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:07,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928019291] [2022-04-06 20:36:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:07,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:07,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:07,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:07,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928019291] [2022-04-06 20:36:07,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928019291] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:07,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242569239] [2022-04-06 20:36:07,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:07,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:07,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:07,443 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 20:36:07,447 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 20:36:07,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:07,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:36:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:07,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:07,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242569239] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:07,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:07,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2022-04-06 20:36:07,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:07,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954714910] [2022-04-06 20:36:07,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954714910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:07,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:07,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:36:07,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093486163] [2022-04-06 20:36:07,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:07,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:36:07,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:36:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:36:07,591 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:07,740 INFO L93 Difference]: Finished difference Result 119 states and 164 transitions. [2022-04-06 20:36:07,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:36:07,742 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:36:07,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:07,742 INFO L225 Difference]: With dead ends: 119 [2022-04-06 20:36:07,743 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 20:36:07,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:36:07,743 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:07,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 56 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:07,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 20:36:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2022-04-06 20:36:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.3867924528301887) internal successors, (147), 106 states have internal predecessors, (147), 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 20:36:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2022-04-06 20:36:07,758 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 24 [2022-04-06 20:36:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:07,759 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2022-04-06 20:36:07,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2022-04-06 20:36:07,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:36:07,759 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:07,759 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:07,775 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 20:36:07,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:07,963 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash 283229409, now seen corresponding path program 17 times [2022-04-06 20:36:07,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:07,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647768424] [2022-04-06 20:36:07,964 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:07,964 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:07,965 INFO L85 PathProgramCache]: Analyzing trace with hash 283229409, now seen corresponding path program 18 times [2022-04-06 20:36:07,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:07,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134949766] [2022-04-06 20:36:07,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:07,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:08,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:08,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:08,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134949766] [2022-04-06 20:36:08,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134949766] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:08,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743897046] [2022-04-06 20:36:08,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:08,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:08,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:08,085 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 20:36:08,086 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 20:36:08,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:36:08,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:36:08,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:08,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:08,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743897046] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:08,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:08,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:36:08,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:08,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647768424] [2022-04-06 20:36:08,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647768424] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:08,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:08,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:36:08,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7740560] [2022-04-06 20:36:08,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:08,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:36:08,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:36:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:36:08,371 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 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 20:36:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:08,855 INFO L93 Difference]: Finished difference Result 203 states and 304 transitions. [2022-04-06 20:36:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:36:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:36:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:08,856 INFO L225 Difference]: With dead ends: 203 [2022-04-06 20:36:08,856 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 20:36:08,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=1025, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:36:08,856 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 83 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:08,857 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 106 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:08,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 20:36:08,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 122. [2022-04-06 20:36:08,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.393162393162393) internal successors, (163), 117 states have internal predecessors, (163), 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 20:36:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 167 transitions. [2022-04-06 20:36:08,873 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 167 transitions. Word has length 24 [2022-04-06 20:36:08,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:08,873 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 167 transitions. [2022-04-06 20:36:08,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 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 20:36:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 167 transitions. [2022-04-06 20:36:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:36:08,874 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:08,874 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:08,889 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 20:36:09,087 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,SelfDestructingSolverStorable22 [2022-04-06 20:36:09,087 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:09,088 INFO L85 PathProgramCache]: Analyzing trace with hash 467119846, now seen corresponding path program 13 times [2022-04-06 20:36:09,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:09,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [100808162] [2022-04-06 20:36:09,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:09,089 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:09,089 INFO L85 PathProgramCache]: Analyzing trace with hash 467119846, now seen corresponding path program 14 times [2022-04-06 20:36:09,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:09,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584894463] [2022-04-06 20:36:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:09,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:09,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:36:09,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:09,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584894463] [2022-04-06 20:36:09,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584894463] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:09,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610563366] [2022-04-06 20:36:09,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:09,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:09,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:09,158 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 20:36:09,159 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 20:36:09,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:09,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:36:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:36:09,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:36:09,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610563366] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:09,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:09,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 19 [2022-04-06 20:36:09,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:09,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [100808162] [2022-04-06 20:36:09,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [100808162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:09,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:09,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:36:09,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140464050] [2022-04-06 20:36:09,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:09,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:36:09,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:09,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:36:09,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:36:09,375 INFO L87 Difference]: Start difference. First operand 122 states and 167 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:09,558 INFO L93 Difference]: Finished difference Result 153 states and 201 transitions. [2022-04-06 20:36:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:36:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:36:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:09,559 INFO L225 Difference]: With dead ends: 153 [2022-04-06 20:36:09,559 INFO L226 Difference]: Without dead ends: 141 [2022-04-06 20:36:09,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:36:09,560 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:09,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 58 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-04-06 20:36:09,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 122. [2022-04-06 20:36:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.3846153846153846) internal successors, (162), 117 states have internal predecessors, (162), 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 20:36:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 166 transitions. [2022-04-06 20:36:09,577 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 166 transitions. Word has length 25 [2022-04-06 20:36:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:09,577 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 166 transitions. [2022-04-06 20:36:09,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 166 transitions. [2022-04-06 20:36:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:36:09,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:09,577 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:09,595 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 20:36:09,791 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,SelfDestructingSolverStorable23 [2022-04-06 20:36:09,791 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:09,792 INFO L85 PathProgramCache]: Analyzing trace with hash -782542170, now seen corresponding path program 11 times [2022-04-06 20:36:09,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:09,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67138908] [2022-04-06 20:36:09,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:09,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash -782542170, now seen corresponding path program 12 times [2022-04-06 20:36:09,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:09,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307561326] [2022-04-06 20:36:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:09,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:09,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:09,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:09,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307561326] [2022-04-06 20:36:09,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307561326] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:09,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909373971] [2022-04-06 20:36:09,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:09,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:09,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:09,881 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 20:36:09,882 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 20:36:09,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:09,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:09,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:36:09,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:10,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:10,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909373971] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:10,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:10,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-04-06 20:36:10,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67138908] [2022-04-06 20:36:10,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67138908] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:10,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:10,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:36:10,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485676559] [2022-04-06 20:36:10,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:10,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:36:10,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:10,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:36:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:36:10,151 INFO L87 Difference]: Start difference. First operand 122 states and 166 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 20:36:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:10,408 INFO L93 Difference]: Finished difference Result 143 states and 189 transitions. [2022-04-06 20:36:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:36:10,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:36:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:10,409 INFO L225 Difference]: With dead ends: 143 [2022-04-06 20:36:10,409 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 20:36:10,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:36:10,409 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:10,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 58 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:10,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 20:36:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2022-04-06 20:36:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.3706896551724137) internal successors, (159), 116 states have internal predecessors, (159), 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 20:36:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2022-04-06 20:36:10,427 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 25 [2022-04-06 20:36:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:10,428 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2022-04-06 20:36:10,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 20:36:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2022-04-06 20:36:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:36:10,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:10,428 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:10,446 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 20:36:10,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:10,637 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:10,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash -216257032, now seen corresponding path program 15 times [2022-04-06 20:36:10,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:10,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [119416248] [2022-04-06 20:36:10,638 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:10,638 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:10,638 INFO L85 PathProgramCache]: Analyzing trace with hash -216257032, now seen corresponding path program 16 times [2022-04-06 20:36:10,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:10,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318222536] [2022-04-06 20:36:10,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:10,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:10,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:36:10,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:10,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318222536] [2022-04-06 20:36:10,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318222536] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:10,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990935194] [2022-04-06 20:36:10,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:10,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:10,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:10,745 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 20:36:10,746 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 20:36:10,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:10,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:10,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:36:10,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:36:10,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 20:36:10,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990935194] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:10,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:10,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 16 [2022-04-06 20:36:10,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:10,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [119416248] [2022-04-06 20:36:10,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [119416248] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:10,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:10,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:36:10,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117187958] [2022-04-06 20:36:10,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:10,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:36:10,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:10,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:36:10,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:36:10,898 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:11,118 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2022-04-06 20:36:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:36:11,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:36:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:11,119 INFO L225 Difference]: With dead ends: 164 [2022-04-06 20:36:11,119 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 20:36:11,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:36:11,120 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:11,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 62 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 20:36:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 121. [2022-04-06 20:36:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.3620689655172413) internal successors, (158), 116 states have internal predecessors, (158), 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 20:36:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 162 transitions. [2022-04-06 20:36:11,144 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 162 transitions. Word has length 25 [2022-04-06 20:36:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:11,144 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 162 transitions. [2022-04-06 20:36:11,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 162 transitions. [2022-04-06 20:36:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:36:11,144 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:11,144 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:11,160 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 20:36:11,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:11,345 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1226882040, now seen corresponding path program 19 times [2022-04-06 20:36:11,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:11,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [789738975] [2022-04-06 20:36:11,347 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:11,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:11,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1226882040, now seen corresponding path program 20 times [2022-04-06 20:36:11,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:11,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119708006] [2022-04-06 20:36:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:11,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:11,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:11,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:11,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119708006] [2022-04-06 20:36:11,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119708006] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:11,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082420521] [2022-04-06 20:36:11,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:11,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:11,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:11,477 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 20:36:11,478 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 20:36:11,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:11,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:36:11,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:11,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:11,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082420521] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:11,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:11,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:36:11,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:11,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [789738975] [2022-04-06 20:36:11,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [789738975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:11,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:11,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:36:11,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524483680] [2022-04-06 20:36:11,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:11,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:36:11,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:11,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:36:11,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:36:11,796 INFO L87 Difference]: Start difference. First operand 121 states and 162 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:12,312 INFO L93 Difference]: Finished difference Result 219 states and 326 transitions. [2022-04-06 20:36:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:36:12,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:36:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:12,314 INFO L225 Difference]: With dead ends: 219 [2022-04-06 20:36:12,314 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 20:36:12,314 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=358, Invalid=1202, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:36:12,315 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 89 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:12,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 118 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:36:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 20:36:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2022-04-06 20:36:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.3700787401574803) internal successors, (174), 127 states have internal predecessors, (174), 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 20:36:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 178 transitions. [2022-04-06 20:36:12,344 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 178 transitions. Word has length 25 [2022-04-06 20:36:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:12,344 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 178 transitions. [2022-04-06 20:36:12,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 178 transitions. [2022-04-06 20:36:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:36:12,345 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:12,345 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:12,361 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 20:36:12,546 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,SelfDestructingSolverStorable26 [2022-04-06 20:36:12,547 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:12,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:12,547 INFO L85 PathProgramCache]: Analyzing trace with hash 415342529, now seen corresponding path program 21 times [2022-04-06 20:36:12,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:12,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [599353352] [2022-04-06 20:36:12,548 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:12,548 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash 415342529, now seen corresponding path program 22 times [2022-04-06 20:36:12,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:12,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731362576] [2022-04-06 20:36:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:12,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:12,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:12,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:12,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731362576] [2022-04-06 20:36:12,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731362576] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:12,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427331807] [2022-04-06 20:36:12,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:12,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:12,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:12,686 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 20:36:12,686 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 20:36:12,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:12,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:12,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:36:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:12,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:13,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427331807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:13,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:13,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:36:13,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [599353352] [2022-04-06 20:36:13,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [599353352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:13,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:13,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:36:13,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385393931] [2022-04-06 20:36:13,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:13,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:36:13,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:36:13,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:36:13,052 INFO L87 Difference]: Start difference. First operand 132 states and 178 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:13,637 INFO L93 Difference]: Finished difference Result 236 states and 353 transitions. [2022-04-06 20:36:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:36:13,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 20:36:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:13,638 INFO L225 Difference]: With dead ends: 236 [2022-04-06 20:36:13,638 INFO L226 Difference]: Without dead ends: 219 [2022-04-06 20:36:13,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=413, Invalid=1393, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:36:13,639 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 102 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:13,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 126 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:36:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-06 20:36:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 143. [2022-04-06 20:36:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.3768115942028984) internal successors, (190), 138 states have internal predecessors, (190), 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 20:36:13,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 194 transitions. [2022-04-06 20:36:13,659 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 194 transitions. Word has length 26 [2022-04-06 20:36:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:13,660 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 194 transitions. [2022-04-06 20:36:13,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:13,660 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 194 transitions. [2022-04-06 20:36:13,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:36:13,660 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:13,660 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:13,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 20:36:13,875 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,SelfDestructingSolverStorable27 [2022-04-06 20:36:13,875 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash -828351928, now seen corresponding path program 17 times [2022-04-06 20:36:13,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:13,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2052273716] [2022-04-06 20:36:13,876 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:13,876 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:13,876 INFO L85 PathProgramCache]: Analyzing trace with hash -828351928, now seen corresponding path program 18 times [2022-04-06 20:36:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:13,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357828734] [2022-04-06 20:36:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:13,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:14,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:14,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:14,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357828734] [2022-04-06 20:36:14,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357828734] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:14,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660916081] [2022-04-06 20:36:14,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:14,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:14,156 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 20:36:14,157 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 20:36:14,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:14,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:14,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:36:14,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:14,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:15,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660916081] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:15,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:15,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 41 [2022-04-06 20:36:15,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:15,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2052273716] [2022-04-06 20:36:15,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2052273716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:15,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:15,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:36:15,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098392841] [2022-04-06 20:36:15,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:15,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:36:15,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:15,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:36:15,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:36:15,232 INFO L87 Difference]: Start difference. First operand 143 states and 194 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:15,781 INFO L93 Difference]: Finished difference Result 156 states and 207 transitions. [2022-04-06 20:36:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:36:15,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:36:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:15,782 INFO L225 Difference]: With dead ends: 156 [2022-04-06 20:36:15,782 INFO L226 Difference]: Without dead ends: 151 [2022-04-06 20:36:15,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=337, Invalid=2419, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:36:15,783 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:15,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 73 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-06 20:36:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2022-04-06 20:36:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.3636363636363635) internal successors, (195), 143 states have internal predecessors, (195), 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 20:36:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 199 transitions. [2022-04-06 20:36:15,815 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 199 transitions. Word has length 27 [2022-04-06 20:36:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:15,815 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 199 transitions. [2022-04-06 20:36:15,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 199 transitions. [2022-04-06 20:36:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:36:15,816 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:15,816 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:15,834 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 20:36:16,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:36:16,032 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1740747864, now seen corresponding path program 19 times [2022-04-06 20:36:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [119607438] [2022-04-06 20:36:16,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:16,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:16,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1740747864, now seen corresponding path program 20 times [2022-04-06 20:36:16,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:16,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896089205] [2022-04-06 20:36:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:16,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:16,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 20:36:16,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:16,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896089205] [2022-04-06 20:36:16,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896089205] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:16,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510044150] [2022-04-06 20:36:16,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:16,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:16,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:16,115 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 20:36:16,116 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 20:36:16,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:16,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:16,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:36:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 20:36:16,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 20:36:16,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510044150] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:16,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:16,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-04-06 20:36:16,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [119607438] [2022-04-06 20:36:16,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [119607438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:16,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:16,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:36:16,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650395027] [2022-04-06 20:36:16,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:16,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:36:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:36:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:36:16,344 INFO L87 Difference]: Start difference. First operand 148 states and 199 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 20:36:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:16,571 INFO L93 Difference]: Finished difference Result 187 states and 242 transitions. [2022-04-06 20:36:16,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:36:16,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 27 [2022-04-06 20:36:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:16,572 INFO L225 Difference]: With dead ends: 187 [2022-04-06 20:36:16,572 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 20:36:16,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:36:16,573 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:16,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 55 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 20:36:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 148. [2022-04-06 20:36:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.3566433566433567) internal successors, (194), 143 states have internal predecessors, (194), 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 20:36:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 198 transitions. [2022-04-06 20:36:16,597 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 198 transitions. Word has length 27 [2022-04-06 20:36:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:16,597 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 198 transitions. [2022-04-06 20:36:16,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 20:36:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 198 transitions. [2022-04-06 20:36:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:36:16,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:16,598 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:16,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:16,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:16,811 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash -734568360, now seen corresponding path program 13 times [2022-04-06 20:36:16,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:16,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834073619] [2022-04-06 20:36:16,812 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:16,812 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:16,813 INFO L85 PathProgramCache]: Analyzing trace with hash -734568360, now seen corresponding path program 14 times [2022-04-06 20:36:16,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:16,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311507424] [2022-04-06 20:36:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:16,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:16,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:36:16,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:16,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311507424] [2022-04-06 20:36:16,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311507424] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:16,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844657556] [2022-04-06 20:36:16,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:16,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:16,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:16,906 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 20:36:16,908 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 20:36:16,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:16,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:16,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:36:16,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:36:17,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:36:17,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844657556] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:17,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:17,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-04-06 20:36:17,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834073619] [2022-04-06 20:36:17,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834073619] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:17,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:17,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:36:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681998989] [2022-04-06 20:36:17,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:17,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:36:17,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:36:17,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:36:17,356 INFO L87 Difference]: Start difference. First operand 148 states and 198 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 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 20:36:17,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:17,627 INFO L93 Difference]: Finished difference Result 186 states and 253 transitions. [2022-04-06 20:36:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:36:17,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have 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 20:36:17,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:17,628 INFO L225 Difference]: With dead ends: 186 [2022-04-06 20:36:17,628 INFO L226 Difference]: Without dead ends: 181 [2022-04-06 20:36:17,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:36:17,629 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:17,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 54 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-04-06 20:36:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 166. [2022-04-06 20:36:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.3788819875776397) internal successors, (222), 161 states have internal predecessors, (222), 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 20:36:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 226 transitions. [2022-04-06 20:36:17,658 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 226 transitions. Word has length 27 [2022-04-06 20:36:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:17,658 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 226 transitions. [2022-04-06 20:36:17,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 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 20:36:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 226 transitions. [2022-04-06 20:36:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:36:17,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:17,658 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:17,676 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 20:36:17,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:17,871 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:17,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1224419256, now seen corresponding path program 21 times [2022-04-06 20:36:17,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:17,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [958770533] [2022-04-06 20:36:17,872 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:17,872 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:17,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1224419256, now seen corresponding path program 22 times [2022-04-06 20:36:17,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:17,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135230116] [2022-04-06 20:36:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:17,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:17,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:36:17,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:17,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135230116] [2022-04-06 20:36:17,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135230116] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:17,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687749855] [2022-04-06 20:36:17,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:17,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:17,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:17,951 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 20:36:17,951 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 20:36:17,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:17,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:36:17,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:36:18,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:36:18,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687749855] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:18,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:18,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 20:36:18,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:18,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [958770533] [2022-04-06 20:36:18,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [958770533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:18,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:18,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:36:18,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310865461] [2022-04-06 20:36:18,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:18,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:36:18,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:36:18,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:36:18,146 INFO L87 Difference]: Start difference. First operand 166 states and 226 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 20:36:18,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:18,407 INFO L93 Difference]: Finished difference Result 225 states and 290 transitions. [2022-04-06 20:36:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:36:18,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 27 [2022-04-06 20:36:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:18,408 INFO L225 Difference]: With dead ends: 225 [2022-04-06 20:36:18,408 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 20:36:18,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:36:18,408 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:18,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 72 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 20:36:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 166. [2022-04-06 20:36:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.3726708074534162) internal successors, (221), 161 states have internal predecessors, (221), 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 20:36:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 225 transitions. [2022-04-06 20:36:18,436 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 225 transitions. Word has length 27 [2022-04-06 20:36:18,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:18,437 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 225 transitions. [2022-04-06 20:36:18,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 20:36:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 225 transitions. [2022-04-06 20:36:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:36:18,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:18,437 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:18,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 20:36:18,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:18,637 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1027421464, now seen corresponding path program 23 times [2022-04-06 20:36:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:18,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610156401] [2022-04-06 20:36:18,639 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:18,639 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:18,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1027421464, now seen corresponding path program 24 times [2022-04-06 20:36:18,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:18,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624297602] [2022-04-06 20:36:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:18,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:18,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:18,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624297602] [2022-04-06 20:36:18,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624297602] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:18,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516770880] [2022-04-06 20:36:18,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:18,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:18,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:18,814 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 20:36:18,815 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 20:36:18,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:36:18,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:18,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:36:18,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:18,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:19,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516770880] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:19,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:19,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:36:19,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610156401] [2022-04-06 20:36:19,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610156401] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:19,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:19,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:36:19,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382658741] [2022-04-06 20:36:19,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:19,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:36:19,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:36:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:36:19,245 INFO L87 Difference]: Start difference. First operand 166 states and 225 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 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 20:36:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:19,976 INFO L93 Difference]: Finished difference Result 296 states and 446 transitions. [2022-04-06 20:36:19,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:36:19,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 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 20:36:19,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:19,978 INFO L225 Difference]: With dead ends: 296 [2022-04-06 20:36:19,978 INFO L226 Difference]: Without dead ends: 277 [2022-04-06 20:36:19,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1598, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:36:19,979 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 109 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:19,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 136 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:36:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-06 20:36:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 179. [2022-04-06 20:36:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.3793103448275863) internal successors, (240), 174 states have internal predecessors, (240), 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 20:36:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 244 transitions. [2022-04-06 20:36:20,009 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 244 transitions. Word has length 27 [2022-04-06 20:36:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:20,009 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 244 transitions. [2022-04-06 20:36:20,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 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 20:36:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 244 transitions. [2022-04-06 20:36:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:36:20,010 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:20,010 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:20,016 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 20:36:20,214 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,SelfDestructingSolverStorable32 [2022-04-06 20:36:20,214 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:20,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash 125389104, now seen corresponding path program 23 times [2022-04-06 20:36:20,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:20,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1143550679] [2022-04-06 20:36:20,215 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:20,215 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash 125389104, now seen corresponding path program 24 times [2022-04-06 20:36:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:20,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620365883] [2022-04-06 20:36:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:20,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:36:20,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:20,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620365883] [2022-04-06 20:36:20,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620365883] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:20,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672572314] [2022-04-06 20:36:20,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:20,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:20,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:20,271 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 20:36:20,272 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 20:36:20,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:20,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:20,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:36:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:36:20,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:36:20,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672572314] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:20,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:20,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-04-06 20:36:20,383 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:20,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1143550679] [2022-04-06 20:36:20,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1143550679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:20,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:20,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:36:20,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369238053] [2022-04-06 20:36:20,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:20,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:36:20,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:20,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:36:20,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:36:20,384 INFO L87 Difference]: Start difference. First operand 179 states and 244 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 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 20:36:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:20,516 INFO L93 Difference]: Finished difference Result 197 states and 263 transitions. [2022-04-06 20:36:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:36:20,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:36:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:20,517 INFO L225 Difference]: With dead ends: 197 [2022-04-06 20:36:20,517 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 20:36:20,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:36:20,517 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:20,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 20:36:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2022-04-06 20:36:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.3823529411764706) internal successors, (235), 170 states have internal predecessors, (235), 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 20:36:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 239 transitions. [2022-04-06 20:36:20,551 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 239 transitions. Word has length 28 [2022-04-06 20:36:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:20,551 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 239 transitions. [2022-04-06 20:36:20,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 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 20:36:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 239 transitions. [2022-04-06 20:36:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:36:20,551 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:20,552 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:20,572 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 20:36:20,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:20,759 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2010729856, now seen corresponding path program 15 times [2022-04-06 20:36:20,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:20,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094038674] [2022-04-06 20:36:20,760 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:20,760 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:20,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2010729856, now seen corresponding path program 16 times [2022-04-06 20:36:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:20,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410571874] [2022-04-06 20:36:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:20,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:20,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:36:20,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:20,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410571874] [2022-04-06 20:36:20,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410571874] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:20,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127269237] [2022-04-06 20:36:20,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:20,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:20,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:20,859 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 20:36:20,859 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 20:36:20,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:20,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:36:20,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:36:21,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:36:21,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127269237] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:21,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:21,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-04-06 20:36:21,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:21,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094038674] [2022-04-06 20:36:21,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094038674] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:21,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:21,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:36:21,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957754269] [2022-04-06 20:36:21,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:21,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:36:21,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:21,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:36:21,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:36:21,224 INFO L87 Difference]: Start difference. First operand 175 states and 239 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 20:36:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:21,596 INFO L93 Difference]: Finished difference Result 208 states and 274 transitions. [2022-04-06 20:36:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:36:21,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 28 [2022-04-06 20:36:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:21,597 INFO L225 Difference]: With dead ends: 208 [2022-04-06 20:36:21,597 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 20:36:21,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:36:21,598 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:21,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 68 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 20:36:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 174. [2022-04-06 20:36:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.3668639053254439) internal successors, (231), 169 states have internal predecessors, (231), 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 20:36:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-04-06 20:36:21,632 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 28 [2022-04-06 20:36:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:21,632 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-04-06 20:36:21,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 20:36:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-04-06 20:36:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:36:21,633 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:21,633 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:21,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 20:36:21,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:21,838 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:21,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1472968031, now seen corresponding path program 25 times [2022-04-06 20:36:21,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:21,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [288760431] [2022-04-06 20:36:21,840 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:21,840 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1472968031, now seen corresponding path program 26 times [2022-04-06 20:36:21,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:21,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142784778] [2022-04-06 20:36:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:22,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:22,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142784778] [2022-04-06 20:36:22,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142784778] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:22,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932633078] [2022-04-06 20:36:22,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:22,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:22,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:22,012 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 20:36:22,012 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 20:36:22,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:22,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:22,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:36:22,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:22,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:22,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932633078] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:22,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:22,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:36:22,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:22,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [288760431] [2022-04-06 20:36:22,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [288760431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:22,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:22,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:36:22,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487390071] [2022-04-06 20:36:22,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:22,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:36:22,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:22,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:36:22,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:36:22,461 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:23,239 INFO L93 Difference]: Finished difference Result 313 states and 471 transitions. [2022-04-06 20:36:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:36:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:36:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:23,241 INFO L225 Difference]: With dead ends: 313 [2022-04-06 20:36:23,241 INFO L226 Difference]: Without dead ends: 293 [2022-04-06 20:36:23,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:36:23,242 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 110 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:23,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 143 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:36:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-04-06 20:36:23,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 187. [2022-04-06 20:36:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.3736263736263736) internal successors, (250), 182 states have internal predecessors, (250), 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 20:36:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 254 transitions. [2022-04-06 20:36:23,278 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 254 transitions. Word has length 28 [2022-04-06 20:36:23,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:23,279 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 254 transitions. [2022-04-06 20:36:23,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 254 transitions. [2022-04-06 20:36:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:36:23,279 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:23,279 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:23,295 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 20:36:23,479 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,SelfDestructingSolverStorable35 [2022-04-06 20:36:23,480 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1753768806, now seen corresponding path program 25 times [2022-04-06 20:36:23,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:23,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082294765] [2022-04-06 20:36:23,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:23,481 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1753768806, now seen corresponding path program 26 times [2022-04-06 20:36:23,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:23,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760616745] [2022-04-06 20:36:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:23,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:23,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:36:23,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:23,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760616745] [2022-04-06 20:36:23,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760616745] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:23,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137740319] [2022-04-06 20:36:23,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:23,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:23,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:23,604 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 20:36:23,605 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 20:36:23,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:23,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:36:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:36:23,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:36:23,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137740319] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:23,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:23,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 21 [2022-04-06 20:36:23,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:23,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082294765] [2022-04-06 20:36:23,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082294765] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:23,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:23,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:36:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620569240] [2022-04-06 20:36:23,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:23,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:36:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:36:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:36:23,839 INFO L87 Difference]: Start difference. First operand 187 states and 254 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 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 20:36:24,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:24,127 INFO L93 Difference]: Finished difference Result 239 states and 311 transitions. [2022-04-06 20:36:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:36:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have 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 20:36:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:24,128 INFO L225 Difference]: With dead ends: 239 [2022-04-06 20:36:24,128 INFO L226 Difference]: Without dead ends: 225 [2022-04-06 20:36:24,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:36:24,129 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:24,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 66 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-04-06 20:36:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 187. [2022-04-06 20:36:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.3681318681318682) internal successors, (249), 182 states have internal predecessors, (249), 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 20:36:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 253 transitions. [2022-04-06 20:36:24,164 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 253 transitions. Word has length 29 [2022-04-06 20:36:24,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:24,164 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 253 transitions. [2022-04-06 20:36:24,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 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 20:36:24,164 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 253 transitions. [2022-04-06 20:36:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:36:24,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:24,165 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:24,183 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 20:36:24,365 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,SelfDestructingSolverStorable36 [2022-04-06 20:36:24,365 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:24,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:24,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1067548216, now seen corresponding path program 27 times [2022-04-06 20:36:24,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:24,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1641071039] [2022-04-06 20:36:24,366 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:24,367 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:24,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1067548216, now seen corresponding path program 28 times [2022-04-06 20:36:24,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:24,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075330933] [2022-04-06 20:36:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:24,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:24,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:36:24,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:24,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075330933] [2022-04-06 20:36:24,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075330933] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:24,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484372112] [2022-04-06 20:36:24,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:24,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:24,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:24,459 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 20:36:24,460 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 20:36:24,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:24,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:24,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:36:24,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:36:24,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:36:24,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484372112] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:24,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:24,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:36:24,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:24,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1641071039] [2022-04-06 20:36:24,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1641071039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:24,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:24,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:36:24,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528491554] [2022-04-06 20:36:24,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:24,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:36:24,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:24,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:36:24,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:36:24,717 INFO L87 Difference]: Start difference. First operand 187 states and 253 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 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 20:36:25,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:25,022 INFO L93 Difference]: Finished difference Result 254 states and 326 transitions. [2022-04-06 20:36:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:36:25,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have 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 20:36:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:25,023 INFO L225 Difference]: With dead ends: 254 [2022-04-06 20:36:25,023 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 20:36:25,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:36:25,024 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:25,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 74 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 20:36:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 187. [2022-04-06 20:36:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.3626373626373627) internal successors, (248), 182 states have internal predecessors, (248), 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 20:36:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 252 transitions. [2022-04-06 20:36:25,060 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 252 transitions. Word has length 29 [2022-04-06 20:36:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:25,060 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 252 transitions. [2022-04-06 20:36:25,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 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 20:36:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 252 transitions. [2022-04-06 20:36:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:36:25,060 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:25,060 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:25,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 20:36:25,264 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,SelfDestructingSolverStorable37 [2022-04-06 20:36:25,264 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:25,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:25,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1675631048, now seen corresponding path program 27 times [2022-04-06 20:36:25,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:25,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [388316062] [2022-04-06 20:36:25,265 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:25,266 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:25,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1675631048, now seen corresponding path program 28 times [2022-04-06 20:36:25,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:25,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468823563] [2022-04-06 20:36:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:25,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:25,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:25,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:25,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468823563] [2022-04-06 20:36:25,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468823563] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:25,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469887430] [2022-04-06 20:36:25,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:25,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:25,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:25,447 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 20:36:25,448 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 20:36:25,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:25,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:25,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:36:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:25,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:25,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469887430] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:25,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:25,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:36:25,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:25,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [388316062] [2022-04-06 20:36:25,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [388316062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:25,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:25,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:36:25,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399803894] [2022-04-06 20:36:25,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:25,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:36:25,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:25,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:36:25,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:36:25,906 INFO L87 Difference]: Start difference. First operand 187 states and 252 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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 20:36:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:26,777 INFO L93 Difference]: Finished difference Result 333 states and 501 transitions. [2022-04-06 20:36:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:36:26,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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 20:36:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:26,778 INFO L225 Difference]: With dead ends: 333 [2022-04-06 20:36:26,778 INFO L226 Difference]: Without dead ends: 313 [2022-04-06 20:36:26,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=602, Invalid=2050, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:36:26,779 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 118 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:26,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 153 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:36:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-04-06 20:36:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 200. [2022-04-06 20:36:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.3692307692307693) internal successors, (267), 195 states have internal predecessors, (267), 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 20:36:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 271 transitions. [2022-04-06 20:36:26,816 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 271 transitions. Word has length 29 [2022-04-06 20:36:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:26,817 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 271 transitions. [2022-04-06 20:36:26,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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 20:36:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 271 transitions. [2022-04-06 20:36:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:36:26,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:26,817 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:26,833 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 20:36:27,023 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,SelfDestructingSolverStorable38 [2022-04-06 20:36:27,024 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1541621168, now seen corresponding path program 17 times [2022-04-06 20:36:27,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:27,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1619169027] [2022-04-06 20:36:27,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:27,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:27,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1541621168, now seen corresponding path program 18 times [2022-04-06 20:36:27,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:27,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897393214] [2022-04-06 20:36:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:27,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:27,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:36:27,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:27,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897393214] [2022-04-06 20:36:27,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897393214] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:27,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955624129] [2022-04-06 20:36:27,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:27,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:27,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:27,143 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 20:36:27,144 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 20:36:27,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:36:27,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:27,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:36:27,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:36:27,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:36:27,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955624129] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:27,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:27,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2022-04-06 20:36:27,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:27,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1619169027] [2022-04-06 20:36:27,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1619169027] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:27,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:27,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:36:27,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991857573] [2022-04-06 20:36:27,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:27,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:36:27,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:27,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:36:27,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:36:27,325 INFO L87 Difference]: Start difference. First operand 200 states and 271 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:27,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:27,654 INFO L93 Difference]: Finished difference Result 242 states and 334 transitions. [2022-04-06 20:36:27,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:36:27,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:36:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:27,655 INFO L225 Difference]: With dead ends: 242 [2022-04-06 20:36:27,655 INFO L226 Difference]: Without dead ends: 237 [2022-04-06 20:36:27,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:36:27,656 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 48 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:27,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 72 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-04-06 20:36:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 228. [2022-04-06 20:36:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.3766816143497758) internal successors, (307), 223 states have internal predecessors, (307), 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 20:36:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 311 transitions. [2022-04-06 20:36:27,702 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 311 transitions. Word has length 30 [2022-04-06 20:36:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:27,702 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 311 transitions. [2022-04-06 20:36:27,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 311 transitions. [2022-04-06 20:36:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:36:27,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:27,703 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:27,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 20:36:27,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:36:27,906 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:27,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:27,906 INFO L85 PathProgramCache]: Analyzing trace with hash 631750017, now seen corresponding path program 29 times [2022-04-06 20:36:27,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:27,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2021913192] [2022-04-06 20:36:27,907 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:27,907 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:27,907 INFO L85 PathProgramCache]: Analyzing trace with hash 631750017, now seen corresponding path program 30 times [2022-04-06 20:36:27,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:27,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212794702] [2022-04-06 20:36:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:27,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:28,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:28,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:28,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212794702] [2022-04-06 20:36:28,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212794702] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:28,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536837791] [2022-04-06 20:36:28,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:28,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:28,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:28,088 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 20:36:28,088 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 20:36:28,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:36:28,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:28,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:36:28,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:28,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:28,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536837791] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:28,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:28,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:36:28,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:28,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2021913192] [2022-04-06 20:36:28,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2021913192] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:28,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:28,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:36:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123245826] [2022-04-06 20:36:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:28,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:36:28,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:36:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:36:28,778 INFO L87 Difference]: Start difference. First operand 228 states and 311 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:29,772 INFO L93 Difference]: Finished difference Result 405 states and 615 transitions. [2022-04-06 20:36:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:36:29,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:36:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:29,774 INFO L225 Difference]: With dead ends: 405 [2022-04-06 20:36:29,774 INFO L226 Difference]: Without dead ends: 383 [2022-04-06 20:36:29,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=673, Invalid=2297, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:36:29,775 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 131 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:29,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 163 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2195 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:36:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-04-06 20:36:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 243. [2022-04-06 20:36:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.3823529411764706) internal successors, (329), 238 states have internal predecessors, (329), 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 20:36:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 333 transitions. [2022-04-06 20:36:29,825 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 333 transitions. Word has length 30 [2022-04-06 20:36:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:29,825 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 333 transitions. [2022-04-06 20:36:29,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 333 transitions. [2022-04-06 20:36:29,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:36:29,826 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:29,826 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:29,829 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 20:36:30,026 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,SelfDestructingSolverStorable40 [2022-04-06 20:36:30,026 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:30,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:30,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1818120792, now seen corresponding path program 29 times [2022-04-06 20:36:30,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:30,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [486628694] [2022-04-06 20:36:30,027 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:30,027 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:30,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1818120792, now seen corresponding path program 30 times [2022-04-06 20:36:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981302202] [2022-04-06 20:36:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:30,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:30,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:30,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:30,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981302202] [2022-04-06 20:36:30,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981302202] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:30,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185957442] [2022-04-06 20:36:30,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:30,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:30,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:30,314 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 20:36:30,314 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 20:36:30,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:30,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:30,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:36:30,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:30,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:36:31,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185957442] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:31,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:31,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 14] total 42 [2022-04-06 20:36:31,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:31,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [486628694] [2022-04-06 20:36:31,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [486628694] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:31,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:31,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:36:31,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49377515] [2022-04-06 20:36:31,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:31,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:36:31,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:31,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:36:31,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:36:31,852 INFO L87 Difference]: Start difference. First operand 243 states and 333 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 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 20:36:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:32,565 INFO L93 Difference]: Finished difference Result 258 states and 348 transitions. [2022-04-06 20:36:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:36:32,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 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 31 [2022-04-06 20:36:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:32,566 INFO L225 Difference]: With dead ends: 258 [2022-04-06 20:36:32,566 INFO L226 Difference]: Without dead ends: 253 [2022-04-06 20:36:32,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=339, Invalid=2741, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:36:32,567 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:32,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 73 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:32,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-04-06 20:36:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 243. [2022-04-06 20:36:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.3823529411764706) internal successors, (329), 238 states have internal predecessors, (329), 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 20:36:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 333 transitions. [2022-04-06 20:36:32,623 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 333 transitions. Word has length 31 [2022-04-06 20:36:32,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:32,623 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 333 transitions. [2022-04-06 20:36:32,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 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 20:36:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 333 transitions. [2022-04-06 20:36:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:36:32,623 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:32,624 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:32,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 20:36:32,824 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,SelfDestructingSolverStorable41 [2022-04-06 20:36:32,824 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:32,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:32,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1038157448, now seen corresponding path program 31 times [2022-04-06 20:36:32,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:32,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [376165156] [2022-04-06 20:36:32,826 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:32,826 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:32,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1038157448, now seen corresponding path program 32 times [2022-04-06 20:36:32,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:32,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449078487] [2022-04-06 20:36:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:32,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:33,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:36:33,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:33,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449078487] [2022-04-06 20:36:33,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449078487] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:33,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055867767] [2022-04-06 20:36:33,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:33,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:33,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:33,057 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 20:36:33,057 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 20:36:33,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:33,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:33,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:36:33,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:36:33,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:36:33,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055867767] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:33,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:33,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 25 [2022-04-06 20:36:33,346 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:33,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [376165156] [2022-04-06 20:36:33,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [376165156] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:33,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:33,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:36:33,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485982441] [2022-04-06 20:36:33,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:33,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:36:33,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:33,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:36:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:36:33,347 INFO L87 Difference]: Start difference. First operand 243 states and 333 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 20:36:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:33,732 INFO L93 Difference]: Finished difference Result 297 states and 392 transitions. [2022-04-06 20:36:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:36:33,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 31 [2022-04-06 20:36:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:33,733 INFO L225 Difference]: With dead ends: 297 [2022-04-06 20:36:33,733 INFO L226 Difference]: Without dead ends: 282 [2022-04-06 20:36:33,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:36:33,734 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:33,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 77 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-06 20:36:33,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 243. [2022-04-06 20:36:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.3781512605042017) internal successors, (328), 238 states have internal predecessors, (328), 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 20:36:33,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 332 transitions. [2022-04-06 20:36:33,786 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 332 transitions. Word has length 31 [2022-04-06 20:36:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:33,786 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 332 transitions. [2022-04-06 20:36:33,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 20:36:33,787 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 332 transitions. [2022-04-06 20:36:33,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:36:33,787 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:33,787 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:33,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 20:36:33,997 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,SelfDestructingSolverStorable42 [2022-04-06 20:36:33,997 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:33,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:33,998 INFO L85 PathProgramCache]: Analyzing trace with hash -281941914, now seen corresponding path program 19 times [2022-04-06 20:36:33,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:33,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [377701332] [2022-04-06 20:36:33,998 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:33,999 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:33,999 INFO L85 PathProgramCache]: Analyzing trace with hash -281941914, now seen corresponding path program 20 times [2022-04-06 20:36:33,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:33,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965404612] [2022-04-06 20:36:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:33,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:34,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:36:34,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965404612] [2022-04-06 20:36:34,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965404612] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421497380] [2022-04-06 20:36:34,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:34,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:34,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:34,115 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 20:36:34,115 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 20:36:34,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:34,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:34,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:36:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:36:34,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:36:34,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421497380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:34,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:34,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2022-04-06 20:36:34,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [377701332] [2022-04-06 20:36:34,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [377701332] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:34,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:34,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:36:34,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923742795] [2022-04-06 20:36:34,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:34,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:36:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:36:34,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:36:34,556 INFO L87 Difference]: Start difference. First operand 243 states and 332 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 20:36:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:35,202 INFO L93 Difference]: Finished difference Result 294 states and 387 transitions. [2022-04-06 20:36:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:36:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 31 [2022-04-06 20:36:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:35,203 INFO L225 Difference]: With dead ends: 294 [2022-04-06 20:36:35,203 INFO L226 Difference]: Without dead ends: 271 [2022-04-06 20:36:35,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=690, Invalid=3600, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:36:35,204 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:35,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 79 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:35,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-04-06 20:36:35,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 242. [2022-04-06 20:36:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.3670886075949367) internal successors, (324), 237 states have internal predecessors, (324), 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 20:36:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 328 transitions. [2022-04-06 20:36:35,257 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 328 transitions. Word has length 31 [2022-04-06 20:36:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:35,257 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 328 transitions. [2022-04-06 20:36:35,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 20:36:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 328 transitions. [2022-04-06 20:36:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:36:35,257 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:35,258 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:35,273 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 20:36:35,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:35,463 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:35,463 INFO L85 PathProgramCache]: Analyzing trace with hash 874450008, now seen corresponding path program 33 times [2022-04-06 20:36:35,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:35,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1492992820] [2022-04-06 20:36:35,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:35,464 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:35,464 INFO L85 PathProgramCache]: Analyzing trace with hash 874450008, now seen corresponding path program 34 times [2022-04-06 20:36:35,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:35,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597171864] [2022-04-06 20:36:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:35,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:35,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:36:35,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:35,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597171864] [2022-04-06 20:36:35,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597171864] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:35,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49935672] [2022-04-06 20:36:35,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:35,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:35,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:35,566 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 20:36:35,567 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 20:36:35,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:35,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:35,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:36:35,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:36:35,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:36:35,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49935672] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:35,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:35,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:36:35,827 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:35,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1492992820] [2022-04-06 20:36:35,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1492992820] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:35,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:35,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:36:35,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841172441] [2022-04-06 20:36:35,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:35,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:36:35,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:35,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:36:35,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:36:35,828 INFO L87 Difference]: Start difference. First operand 242 states and 328 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 20:36:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:36,227 INFO L93 Difference]: Finished difference Result 312 states and 404 transitions. [2022-04-06 20:36:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:36:36,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 31 [2022-04-06 20:36:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:36,228 INFO L225 Difference]: With dead ends: 312 [2022-04-06 20:36:36,228 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 20:36:36,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:36:36,241 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:36,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 78 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 20:36:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 242. [2022-04-06 20:36:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.3628691983122363) internal successors, (323), 237 states have internal predecessors, (323), 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 20:36:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 327 transitions. [2022-04-06 20:36:36,294 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 327 transitions. Word has length 31 [2022-04-06 20:36:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:36,295 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 327 transitions. [2022-04-06 20:36:36,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 20:36:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 327 transitions. [2022-04-06 20:36:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:36:36,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:36,295 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:36,312 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 20:36:36,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:36,500 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2116095112, now seen corresponding path program 35 times [2022-04-06 20:36:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:36,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2081842460] [2022-04-06 20:36:36,501 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:36,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:36,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2116095112, now seen corresponding path program 36 times [2022-04-06 20:36:36,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:36,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986786652] [2022-04-06 20:36:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:36,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:36,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:36:36,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:36,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986786652] [2022-04-06 20:36:36,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986786652] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:36,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569533540] [2022-04-06 20:36:36,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:36,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:36,593 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 20:36:36,593 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 20:36:36,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:36:36,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:36,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:36:36,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:36:36,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:36:36,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569533540] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:36,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:36,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:36:36,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:36,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2081842460] [2022-04-06 20:36:36,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2081842460] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:36,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:36,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:36:36,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798556180] [2022-04-06 20:36:36,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:36,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:36:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:36,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:36:36,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:36:36,894 INFO L87 Difference]: Start difference. First operand 242 states and 327 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 20:36:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:37,313 INFO L93 Difference]: Finished difference Result 329 states and 421 transitions. [2022-04-06 20:36:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:36:37,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 31 [2022-04-06 20:36:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:37,314 INFO L225 Difference]: With dead ends: 329 [2022-04-06 20:36:37,314 INFO L226 Difference]: Without dead ends: 314 [2022-04-06 20:36:37,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:36:37,315 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 52 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:37,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 89 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-04-06 20:36:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 242. [2022-04-06 20:36:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.358649789029536) internal successors, (322), 237 states have internal predecessors, (322), 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 20:36:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 326 transitions. [2022-04-06 20:36:37,369 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 326 transitions. Word has length 31 [2022-04-06 20:36:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:37,369 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 326 transitions. [2022-04-06 20:36:37,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 20:36:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 326 transitions. [2022-04-06 20:36:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:36:37,370 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:37,370 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:37,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 20:36:37,570 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,SelfDestructingSolverStorable45 [2022-04-06 20:36:37,570 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash -853881000, now seen corresponding path program 31 times [2022-04-06 20:36:37,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:37,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1958097316] [2022-04-06 20:36:37,571 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:37,571 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash -853881000, now seen corresponding path program 32 times [2022-04-06 20:36:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:37,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693738975] [2022-04-06 20:36:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:37,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:37,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:37,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:37,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693738975] [2022-04-06 20:36:37,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693738975] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:37,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673920581] [2022-04-06 20:36:37,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:37,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:37,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:37,770 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 20:36:37,770 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 20:36:37,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:37,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:36:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:37,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:38,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673920581] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:38,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:38,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:36:38,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1958097316] [2022-04-06 20:36:38,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1958097316] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:38,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:38,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:36:38,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517448644] [2022-04-06 20:36:38,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:38,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:36:38,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:38,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:36:38,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:36:38,317 INFO L87 Difference]: Start difference. First operand 242 states and 326 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 20:36:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:39,466 INFO L93 Difference]: Finished difference Result 427 states and 645 transitions. [2022-04-06 20:36:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:36:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 20:36:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:39,467 INFO L225 Difference]: With dead ends: 427 [2022-04-06 20:36:39,467 INFO L226 Difference]: Without dead ends: 405 [2022-04-06 20:36:39,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=748, Invalid=2558, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:36:39,468 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 136 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:39,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 173 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:36:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-04-06 20:36:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 257. [2022-04-06 20:36:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.3650793650793651) internal successors, (344), 252 states have internal predecessors, (344), 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 20:36:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 348 transitions. [2022-04-06 20:36:39,530 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 348 transitions. Word has length 31 [2022-04-06 20:36:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:39,530 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 348 transitions. [2022-04-06 20:36:39,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 20:36:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 348 transitions. [2022-04-06 20:36:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:36:39,531 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:39,531 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:39,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:39,746 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,SelfDestructingSolverStorable46 [2022-04-06 20:36:39,747 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:39,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:39,747 INFO L85 PathProgramCache]: Analyzing trace with hash 561664800, now seen corresponding path program 37 times [2022-04-06 20:36:39,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:39,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1035536826] [2022-04-06 20:36:39,748 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:39,748 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:39,748 INFO L85 PathProgramCache]: Analyzing trace with hash 561664800, now seen corresponding path program 38 times [2022-04-06 20:36:39,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:39,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959527444] [2022-04-06 20:36:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:39,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:39,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:36:39,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:39,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959527444] [2022-04-06 20:36:39,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959527444] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:39,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299080557] [2022-04-06 20:36:39,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:39,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:39,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:39,819 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 20:36:39,822 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 20:36:39,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:39,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:36:39,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:36:39,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:36:39,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299080557] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:39,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:39,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-04-06 20:36:39,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:39,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1035536826] [2022-04-06 20:36:39,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1035536826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:39,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:39,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:36:39,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917639246] [2022-04-06 20:36:39,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:39,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:36:39,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:39,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:36:39,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:36:39,944 INFO L87 Difference]: Start difference. First operand 257 states and 348 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:40,141 INFO L93 Difference]: Finished difference Result 278 states and 370 transitions. [2022-04-06 20:36:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:36:40,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:36:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:40,142 INFO L225 Difference]: With dead ends: 278 [2022-04-06 20:36:40,142 INFO L226 Difference]: Without dead ends: 256 [2022-04-06 20:36:40,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:36:40,143 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:40,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 55 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-04-06 20:36:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2022-04-06 20:36:40,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.368421052631579) internal successors, (338), 247 states have internal predecessors, (338), 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 20:36:40,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 342 transitions. [2022-04-06 20:36:40,211 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 342 transitions. Word has length 32 [2022-04-06 20:36:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:40,211 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 342 transitions. [2022-04-06 20:36:40,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 342 transitions. [2022-04-06 20:36:40,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:36:40,212 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:40,212 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:40,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 20:36:40,413 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,SelfDestructingSolverStorable47 [2022-04-06 20:36:40,414 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash 336197729, now seen corresponding path program 33 times [2022-04-06 20:36:40,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:40,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [734722867] [2022-04-06 20:36:40,415 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:40,415 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash 336197729, now seen corresponding path program 34 times [2022-04-06 20:36:40,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:40,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735486403] [2022-04-06 20:36:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:40,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:40,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:40,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:40,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735486403] [2022-04-06 20:36:40,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735486403] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:40,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095900507] [2022-04-06 20:36:40,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:40,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:40,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:40,657 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 20:36:40,658 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 20:36:40,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:40,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:36:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:40,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:41,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095900507] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:41,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:41,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:36:41,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:41,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [734722867] [2022-04-06 20:36:41,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [734722867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:41,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:41,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:36:41,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362757717] [2022-04-06 20:36:41,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:41,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:36:41,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:41,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:36:41,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:36:41,264 INFO L87 Difference]: Start difference. First operand 252 states and 342 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:36:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:42,542 INFO L93 Difference]: Finished difference Result 447 states and 678 transitions. [2022-04-06 20:36:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:36:42,542 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:36:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:42,544 INFO L225 Difference]: With dead ends: 447 [2022-04-06 20:36:42,544 INFO L226 Difference]: Without dead ends: 424 [2022-04-06 20:36:42,544 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=827, Invalid=2833, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:36:42,544 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 140 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2720 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:42,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 180 Invalid, 2820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2720 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:36:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-04-06 20:36:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 267. [2022-04-06 20:36:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.3740458015267176) internal successors, (360), 262 states have internal predecessors, (360), 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 20:36:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 364 transitions. [2022-04-06 20:36:42,610 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 364 transitions. Word has length 32 [2022-04-06 20:36:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:42,612 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 364 transitions. [2022-04-06 20:36:42,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:36:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 364 transitions. [2022-04-06 20:36:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:36:42,613 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:42,613 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:42,629 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 20:36:42,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:42,828 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2019384376, now seen corresponding path program 39 times [2022-04-06 20:36:42,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:42,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [610633478] [2022-04-06 20:36:42,830 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:42,830 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:42,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2019384376, now seen corresponding path program 40 times [2022-04-06 20:36:42,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:42,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435687689] [2022-04-06 20:36:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:42,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:42,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 20:36:42,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:42,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435687689] [2022-04-06 20:36:42,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435687689] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:42,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303247859] [2022-04-06 20:36:42,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:42,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:42,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:42,936 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 20:36:42,951 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 20:36:42,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:42,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:42,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:36:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 20:36:43,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:36:43,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303247859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:43,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:43,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 26 [2022-04-06 20:36:43,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:43,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [610633478] [2022-04-06 20:36:43,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [610633478] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:43,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:43,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:36:43,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180744445] [2022-04-06 20:36:43,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:43,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:36:43,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:43,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:36:43,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:36:43,282 INFO L87 Difference]: Start difference. First operand 267 states and 364 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:43,744 INFO L93 Difference]: Finished difference Result 328 states and 431 transitions. [2022-04-06 20:36:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:36:43,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:36:43,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:43,745 INFO L225 Difference]: With dead ends: 328 [2022-04-06 20:36:43,745 INFO L226 Difference]: Without dead ends: 312 [2022-04-06 20:36:43,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:36:43,746 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:43,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 81 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-04-06 20:36:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 267. [2022-04-06 20:36:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.3702290076335877) internal successors, (359), 262 states have internal predecessors, (359), 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 20:36:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 363 transitions. [2022-04-06 20:36:43,816 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 363 transitions. Word has length 33 [2022-04-06 20:36:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:43,816 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 363 transitions. [2022-04-06 20:36:43,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 363 transitions. [2022-04-06 20:36:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:36:43,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:43,817 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:43,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 20:36:44,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 20:36:44,028 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash -475206312, now seen corresponding path program 21 times [2022-04-06 20:36:44,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:44,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617507069] [2022-04-06 20:36:44,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:44,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:44,030 INFO L85 PathProgramCache]: Analyzing trace with hash -475206312, now seen corresponding path program 22 times [2022-04-06 20:36:44,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:44,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232776147] [2022-04-06 20:36:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:44,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:44,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:36:44,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:44,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232776147] [2022-04-06 20:36:44,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232776147] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:44,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446881984] [2022-04-06 20:36:44,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:44,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:44,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:44,179 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 20:36:44,180 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 20:36:44,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:44,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:44,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:36:44,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:36:44,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:36:44,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446881984] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:44,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:44,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2022-04-06 20:36:44,390 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:44,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617507069] [2022-04-06 20:36:44,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617507069] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:44,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:44,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:36:44,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759461507] [2022-04-06 20:36:44,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:44,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:36:44,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:44,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:36:44,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:36:44,391 INFO L87 Difference]: Start difference. First operand 267 states and 363 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:44,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:44,843 INFO L93 Difference]: Finished difference Result 316 states and 437 transitions. [2022-04-06 20:36:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:36:44,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:36:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:44,844 INFO L225 Difference]: With dead ends: 316 [2022-04-06 20:36:44,844 INFO L226 Difference]: Without dead ends: 311 [2022-04-06 20:36:44,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:36:44,844 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:44,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 50 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-04-06 20:36:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 300. [2022-04-06 20:36:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.376271186440678) internal successors, (406), 295 states have internal predecessors, (406), 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 20:36:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 410 transitions. [2022-04-06 20:36:44,922 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 410 transitions. Word has length 33 [2022-04-06 20:36:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:44,922 INFO L478 AbstractCegarLoop]: Abstraction has 300 states and 410 transitions. [2022-04-06 20:36:44,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 410 transitions. [2022-04-06 20:36:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:36:44,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:44,922 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:44,938 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 20:36:45,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:45,128 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -891263002, now seen corresponding path program 41 times [2022-04-06 20:36:45,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:45,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1734427664] [2022-04-06 20:36:45,129 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:45,129 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash -891263002, now seen corresponding path program 42 times [2022-04-06 20:36:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:45,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250703531] [2022-04-06 20:36:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:45,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:45,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:36:45,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250703531] [2022-04-06 20:36:45,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250703531] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:45,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833707611] [2022-04-06 20:36:45,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:45,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:45,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:45,276 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 20:36:45,278 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 20:36:45,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:36:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:45,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:36:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:36:45,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:36:45,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833707611] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:45,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:45,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:36:45,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:45,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1734427664] [2022-04-06 20:36:45,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1734427664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:45,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:45,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:36:45,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952852133] [2022-04-06 20:36:45,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:45,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:36:45,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:36:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:36:45,608 INFO L87 Difference]: Start difference. First operand 300 states and 410 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:46,110 INFO L93 Difference]: Finished difference Result 392 states and 509 transitions. [2022-04-06 20:36:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:36:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:36:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:46,111 INFO L225 Difference]: With dead ends: 392 [2022-04-06 20:36:46,111 INFO L226 Difference]: Without dead ends: 376 [2022-04-06 20:36:46,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:36:46,112 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:46,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 87 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-04-06 20:36:46,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 300. [2022-04-06 20:36:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.3728813559322033) internal successors, (405), 295 states have internal predecessors, (405), 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 20:36:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 409 transitions. [2022-04-06 20:36:46,190 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 409 transitions. Word has length 33 [2022-04-06 20:36:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:46,191 INFO L478 AbstractCegarLoop]: Abstraction has 300 states and 409 transitions. [2022-04-06 20:36:46,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 409 transitions. [2022-04-06 20:36:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:36:46,191 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:46,191 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:46,207 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 20:36:46,394 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,SelfDestructingSolverStorable51 [2022-04-06 20:36:46,394 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash -15323528, now seen corresponding path program 43 times [2022-04-06 20:36:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060115180] [2022-04-06 20:36:46,395 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:46,395 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:46,395 INFO L85 PathProgramCache]: Analyzing trace with hash -15323528, now seen corresponding path program 44 times [2022-04-06 20:36:46,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:46,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710494267] [2022-04-06 20:36:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:46,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:36:46,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:46,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710494267] [2022-04-06 20:36:46,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710494267] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:46,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083751279] [2022-04-06 20:36:46,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:46,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:46,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:46,517 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 20:36:46,518 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 20:36:46,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:46,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:46,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:36:46,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:36:46,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:36:46,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083751279] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:46,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:46,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:36:46,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:46,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060115180] [2022-04-06 20:36:46,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060115180] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:46,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:46,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:36:46,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037725519] [2022-04-06 20:36:46,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:46,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:36:46,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:36:46,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:36:46,834 INFO L87 Difference]: Start difference. First operand 300 states and 409 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:47,366 INFO L93 Difference]: Finished difference Result 411 states and 528 transitions. [2022-04-06 20:36:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:36:47,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:36:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:47,367 INFO L225 Difference]: With dead ends: 411 [2022-04-06 20:36:47,367 INFO L226 Difference]: Without dead ends: 395 [2022-04-06 20:36:47,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:36:47,367 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 54 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:47,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 96 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-04-06 20:36:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 300. [2022-04-06 20:36:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.3694915254237288) internal successors, (404), 295 states have internal predecessors, (404), 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 20:36:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 408 transitions. [2022-04-06 20:36:47,450 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 408 transitions. Word has length 33 [2022-04-06 20:36:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:47,451 INFO L478 AbstractCegarLoop]: Abstraction has 300 states and 408 transitions. [2022-04-06 20:36:47,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 408 transitions. [2022-04-06 20:36:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:36:47,451 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:47,451 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:47,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 20:36:47,665 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,SelfDestructingSolverStorable52 [2022-04-06 20:36:47,665 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:47,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:47,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1426067336, now seen corresponding path program 35 times [2022-04-06 20:36:47,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:47,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [270283829] [2022-04-06 20:36:47,666 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:47,666 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:47,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1426067336, now seen corresponding path program 36 times [2022-04-06 20:36:47,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:47,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086416323] [2022-04-06 20:36:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:47,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:47,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:47,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086416323] [2022-04-06 20:36:47,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086416323] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:47,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127481877] [2022-04-06 20:36:47,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:47,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:47,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:47,899 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 20:36:47,899 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 20:36:48,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:36:48,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:48,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:36:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:48,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:48,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127481877] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:48,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:48,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:36:48,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:48,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [270283829] [2022-04-06 20:36:48,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [270283829] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:48,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:48,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:36:48,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720894416] [2022-04-06 20:36:48,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:48,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:36:48,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:48,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:36:48,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:36:48,739 INFO L87 Difference]: Start difference. First operand 300 states and 408 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 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 20:36:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:50,150 INFO L93 Difference]: Finished difference Result 531 states and 808 transitions. [2022-04-06 20:36:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:36:50,150 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 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 20:36:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:50,152 INFO L225 Difference]: With dead ends: 531 [2022-04-06 20:36:50,152 INFO L226 Difference]: Without dead ends: 506 [2022-04-06 20:36:50,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=3122, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:36:50,152 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 146 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3043 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:50,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 190 Invalid, 3146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3043 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:36:50,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-04-06 20:36:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 317. [2022-04-06 20:36:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 312 states have (on average 1.375) internal successors, (429), 312 states have internal predecessors, (429), 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 20:36:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 433 transitions. [2022-04-06 20:36:50,238 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 433 transitions. Word has length 33 [2022-04-06 20:36:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:50,238 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 433 transitions. [2022-04-06 20:36:50,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 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 20:36:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 433 transitions. [2022-04-06 20:36:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:36:50,239 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:50,239 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:50,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 20:36:50,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:50,443 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:50,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1901015744, now seen corresponding path program 23 times [2022-04-06 20:36:50,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:50,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [107423313] [2022-04-06 20:36:50,444 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:50,444 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1901015744, now seen corresponding path program 24 times [2022-04-06 20:36:50,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:50,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839937213] [2022-04-06 20:36:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:50,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:50,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:36:50,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:50,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839937213] [2022-04-06 20:36:50,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839937213] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:50,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921201285] [2022-04-06 20:36:50,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:50,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:50,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:50,586 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 20:36:50,587 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 20:36:50,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:36:50,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:50,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:36:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:36:50,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:36:51,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921201285] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:51,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:51,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 38 [2022-04-06 20:36:51,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [107423313] [2022-04-06 20:36:51,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [107423313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:51,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:51,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:36:51,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708484948] [2022-04-06 20:36:51,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:51,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:36:51,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:51,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:36:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:36:51,145 INFO L87 Difference]: Start difference. First operand 317 states and 433 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 20:36:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:52,007 INFO L93 Difference]: Finished difference Result 388 states and 509 transitions. [2022-04-06 20:36:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:36:52,007 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 34 [2022-04-06 20:36:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:52,008 INFO L225 Difference]: With dead ends: 388 [2022-04-06 20:36:52,008 INFO L226 Difference]: Without dead ends: 350 [2022-04-06 20:36:52,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=924, Invalid=5082, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:36:52,009 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:52,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 91 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-04-06 20:36:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 316. [2022-04-06 20:36:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.3633440514469453) internal successors, (424), 311 states have internal predecessors, (424), 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 20:36:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 428 transitions. [2022-04-06 20:36:52,103 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 428 transitions. Word has length 34 [2022-04-06 20:36:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:52,103 INFO L478 AbstractCegarLoop]: Abstraction has 316 states and 428 transitions. [2022-04-06 20:36:52,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 20:36:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 428 transitions. [2022-04-06 20:36:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:36:52,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:52,104 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:52,120 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 20:36:52,319 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,SelfDestructingSolverStorable54 [2022-04-06 20:36:52,319 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash -221709503, now seen corresponding path program 37 times [2022-04-06 20:36:52,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:52,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1535671986] [2022-04-06 20:36:52,320 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:52,320 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:52,321 INFO L85 PathProgramCache]: Analyzing trace with hash -221709503, now seen corresponding path program 38 times [2022-04-06 20:36:52,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:52,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835508971] [2022-04-06 20:36:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:52,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:52,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:52,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:52,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835508971] [2022-04-06 20:36:52,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835508971] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:52,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880784294] [2022-04-06 20:36:52,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:52,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:52,599 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 20:36:52,600 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 20:36:52,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:52,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:52,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:36:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:52,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:53,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880784294] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:53,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:53,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:36:53,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:53,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1535671986] [2022-04-06 20:36:53,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1535671986] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:53,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:53,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:36:53,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684666699] [2022-04-06 20:36:53,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:53,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:36:53,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:53,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:36:53,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1579, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:36:53,301 INFO L87 Difference]: Start difference. First operand 316 states and 428 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:54,845 INFO L93 Difference]: Finished difference Result 556 states and 845 transitions. [2022-04-06 20:36:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:36:54,845 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:36:54,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:54,846 INFO L225 Difference]: With dead ends: 556 [2022-04-06 20:36:54,846 INFO L226 Difference]: Without dead ends: 531 [2022-04-06 20:36:54,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=997, Invalid=3425, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:36:54,847 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 158 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3382 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 3494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:54,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 200 Invalid, 3494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3382 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:36:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-04-06 20:36:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 333. [2022-04-06 20:36:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.3689024390243902) internal successors, (449), 328 states have internal predecessors, (449), 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 20:36:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 453 transitions. [2022-04-06 20:36:54,932 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 453 transitions. Word has length 34 [2022-04-06 20:36:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:54,933 INFO L478 AbstractCegarLoop]: Abstraction has 333 states and 453 transitions. [2022-04-06 20:36:54,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 453 transitions. [2022-04-06 20:36:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:36:54,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:54,933 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:54,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 20:36:55,134 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,SelfDestructingSolverStorable55 [2022-04-06 20:36:55,134 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:55,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash 144704712, now seen corresponding path program 45 times [2022-04-06 20:36:55,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:55,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638469086] [2022-04-06 20:36:55,135 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:55,135 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:55,135 INFO L85 PathProgramCache]: Analyzing trace with hash 144704712, now seen corresponding path program 46 times [2022-04-06 20:36:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36115350] [2022-04-06 20:36:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:55,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:55,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:36:55,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:55,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36115350] [2022-04-06 20:36:55,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36115350] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:55,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072888554] [2022-04-06 20:36:55,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:55,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:55,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:55,569 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 20:36:55,569 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 20:36:55,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:55,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:55,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:36:55,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:58,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:04,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072888554] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:04,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:04,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 20] total 52 [2022-04-06 20:37:04,321 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638469086] [2022-04-06 20:37:04,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638469086] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:04,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:04,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:37:04,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647683724] [2022-04-06 20:37:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:04,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:37:04,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:04,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:37:04,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2254, Unknown=2, NotChecked=0, Total=2652 [2022-04-06 20:37:04,322 INFO L87 Difference]: Start difference. First operand 333 states and 453 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:37:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:05,702 INFO L93 Difference]: Finished difference Result 350 states and 470 transitions. [2022-04-06 20:37:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:37:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have 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 20:37:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:05,703 INFO L225 Difference]: With dead ends: 350 [2022-04-06 20:37:05,703 INFO L226 Difference]: Without dead ends: 345 [2022-04-06 20:37:05,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=546, Invalid=4008, Unknown=2, NotChecked=0, Total=4556 [2022-04-06 20:37:05,704 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:05,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-04-06 20:37:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 333. [2022-04-06 20:37:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.3689024390243902) internal successors, (449), 328 states have internal predecessors, (449), 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 20:37:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 453 transitions. [2022-04-06 20:37:05,794 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 453 transitions. Word has length 35 [2022-04-06 20:37:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:05,795 INFO L478 AbstractCegarLoop]: Abstraction has 333 states and 453 transitions. [2022-04-06 20:37:05,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:37:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 453 transitions. [2022-04-06 20:37:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:37:05,795 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:05,795 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:05,799 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 20:37:05,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:05,996 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:05,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1479667000, now seen corresponding path program 47 times [2022-04-06 20:37:05,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:05,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [466392679] [2022-04-06 20:37:05,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:05,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:05,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1479667000, now seen corresponding path program 48 times [2022-04-06 20:37:05,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:05,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783240334] [2022-04-06 20:37:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:05,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:06,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:37:06,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783240334] [2022-04-06 20:37:06,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783240334] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045488497] [2022-04-06 20:37:06,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:06,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:06,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:06,133 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 20:37:06,133 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 20:37:06,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:37:06,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:06,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:37:06,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:37:06,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:37:06,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045488497] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:06,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:06,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:37:06,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:06,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [466392679] [2022-04-06 20:37:06,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [466392679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:06,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:06,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:37:06,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668051212] [2022-04-06 20:37:06,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:06,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:37:06,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:06,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:37:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:06,481 INFO L87 Difference]: Start difference. First operand 333 states and 453 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 20:37:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:07,079 INFO L93 Difference]: Finished difference Result 414 states and 541 transitions. [2022-04-06 20:37:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:37:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 35 [2022-04-06 20:37:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:07,081 INFO L225 Difference]: With dead ends: 414 [2022-04-06 20:37:07,081 INFO L226 Difference]: Without dead ends: 397 [2022-04-06 20:37:07,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=1577, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:37:07,081 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:07,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 95 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-04-06 20:37:07,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 333. [2022-04-06 20:37:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.3658536585365855) internal successors, (448), 328 states have internal predecessors, (448), 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 20:37:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 452 transitions. [2022-04-06 20:37:07,172 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 452 transitions. Word has length 35 [2022-04-06 20:37:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:07,172 INFO L478 AbstractCegarLoop]: Abstraction has 333 states and 452 transitions. [2022-04-06 20:37:07,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 20:37:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 452 transitions. [2022-04-06 20:37:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:37:07,178 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:07,178 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:07,199 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 20:37:07,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:07,394 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:07,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash 648860760, now seen corresponding path program 49 times [2022-04-06 20:37:07,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:07,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1052070791] [2022-04-06 20:37:07,395 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:07,395 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:07,395 INFO L85 PathProgramCache]: Analyzing trace with hash 648860760, now seen corresponding path program 50 times [2022-04-06 20:37:07,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:07,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683448442] [2022-04-06 20:37:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:07,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:07,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:37:07,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:07,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683448442] [2022-04-06 20:37:07,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683448442] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:07,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834171713] [2022-04-06 20:37:07,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:07,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:07,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:07,509 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 20:37:07,509 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 20:37:07,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:07,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:37:07,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:37:07,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:37:07,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834171713] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:07,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:07,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:37:07,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:07,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1052070791] [2022-04-06 20:37:07,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1052070791] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:07,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:07,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:37:07,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908381150] [2022-04-06 20:37:07,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:07,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:37:07,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:07,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:37:07,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:07,855 INFO L87 Difference]: Start difference. First operand 333 states and 452 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 20:37:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:08,455 INFO L93 Difference]: Finished difference Result 433 states and 560 transitions. [2022-04-06 20:37:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:37:08,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 35 [2022-04-06 20:37:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:08,458 INFO L225 Difference]: With dead ends: 433 [2022-04-06 20:37:08,458 INFO L226 Difference]: Without dead ends: 416 [2022-04-06 20:37:08,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1432, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:37:08,459 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 51 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:08,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 95 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-04-06 20:37:08,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 333. [2022-04-06 20:37:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.3628048780487805) internal successors, (447), 328 states have internal predecessors, (447), 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 20:37:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 451 transitions. [2022-04-06 20:37:08,552 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 451 transitions. Word has length 35 [2022-04-06 20:37:08,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:08,552 INFO L478 AbstractCegarLoop]: Abstraction has 333 states and 451 transitions. [2022-04-06 20:37:08,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 20:37:08,552 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 451 transitions. [2022-04-06 20:37:08,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:37:08,553 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:08,553 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:08,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:08,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:08,767 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:08,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1222139704, now seen corresponding path program 51 times [2022-04-06 20:37:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:08,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [225707913] [2022-04-06 20:37:08,768 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:08,768 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:08,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1222139704, now seen corresponding path program 52 times [2022-04-06 20:37:08,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:08,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227638620] [2022-04-06 20:37:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:08,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:08,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:37:08,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:08,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227638620] [2022-04-06 20:37:08,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227638620] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:08,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530857618] [2022-04-06 20:37:08,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:08,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:08,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:08,898 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:08,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:37:08,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:08,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:37:08,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:37:09,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:37:09,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530857618] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:09,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:09,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:37:09,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:09,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [225707913] [2022-04-06 20:37:09,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [225707913] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:09,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:09,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:37:09,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139534290] [2022-04-06 20:37:09,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:09,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:37:09,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:09,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:37:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:09,263 INFO L87 Difference]: Start difference. First operand 333 states and 451 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 20:37:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:09,895 INFO L93 Difference]: Finished difference Result 453 states and 580 transitions. [2022-04-06 20:37:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:37:09,895 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 35 [2022-04-06 20:37:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:09,896 INFO L225 Difference]: With dead ends: 453 [2022-04-06 20:37:09,896 INFO L226 Difference]: Without dead ends: 436 [2022-04-06 20:37:09,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=1287, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:37:09,896 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:09,897 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 106 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-04-06 20:37:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 333. [2022-04-06 20:37:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.3597560975609757) internal successors, (446), 328 states have internal predecessors, (446), 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 20:37:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 450 transitions. [2022-04-06 20:37:09,989 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 450 transitions. Word has length 35 [2022-04-06 20:37:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:09,989 INFO L478 AbstractCegarLoop]: Abstraction has 333 states and 450 transitions. [2022-04-06 20:37:09,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 20:37:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 450 transitions. [2022-04-06 20:37:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:37:09,990 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:09,990 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:10,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:10,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:37:10,206 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1541322344, now seen corresponding path program 39 times [2022-04-06 20:37:10,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:10,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1716059933] [2022-04-06 20:37:10,207 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:10,207 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1541322344, now seen corresponding path program 40 times [2022-04-06 20:37:10,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:10,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760628335] [2022-04-06 20:37:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:10,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:10,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:10,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:10,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760628335] [2022-04-06 20:37:10,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760628335] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:10,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385056343] [2022-04-06 20:37:10,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:10,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:10,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:10,503 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:10,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:37:10,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:10,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:10,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:37:10,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:10,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:11,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385056343] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:11,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:11,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:37:11,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:11,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1716059933] [2022-04-06 20:37:11,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1716059933] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:11,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:11,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:37:11,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146704366] [2022-04-06 20:37:11,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:11,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:37:11,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:11,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:37:11,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=1720, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:37:11,282 INFO L87 Difference]: Start difference. First operand 333 states and 450 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 20:37:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:12,989 INFO L93 Difference]: Finished difference Result 582 states and 884 transitions. [2022-04-06 20:37:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:37:12,990 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 20:37:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:12,991 INFO L225 Difference]: With dead ends: 582 [2022-04-06 20:37:12,991 INFO L226 Difference]: Without dead ends: 557 [2022-04-06 20:37:12,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:37:12,992 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 165 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3740 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 3856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:12,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 210 Invalid, 3856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3740 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:37:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-04-06 20:37:13,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 350. [2022-04-06 20:37:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.3652173913043477) internal successors, (471), 345 states have internal predecessors, (471), 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 20:37:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 475 transitions. [2022-04-06 20:37:13,092 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 475 transitions. Word has length 35 [2022-04-06 20:37:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:13,093 INFO L478 AbstractCegarLoop]: Abstraction has 350 states and 475 transitions. [2022-04-06 20:37:13,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 20:37:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 475 transitions. [2022-04-06 20:37:13,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:13,093 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:13,093 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:13,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 20:37:13,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-04-06 20:37:13,298 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:13,298 INFO L85 PathProgramCache]: Analyzing trace with hash 225373872, now seen corresponding path program 53 times [2022-04-06 20:37:13,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:13,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853119489] [2022-04-06 20:37:13,299 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:13,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash 225373872, now seen corresponding path program 54 times [2022-04-06 20:37:13,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:13,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141358097] [2022-04-06 20:37:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:13,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:13,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:13,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:13,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141358097] [2022-04-06 20:37:13,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141358097] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:13,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601493302] [2022-04-06 20:37:13,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:13,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:13,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:13,368 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:13,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:37:13,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:37:13,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:37:13,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:13,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:13,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601493302] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:13,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:13,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-04-06 20:37:13,616 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:13,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853119489] [2022-04-06 20:37:13,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853119489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:13,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:13,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:37:13,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641315268] [2022-04-06 20:37:13,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:13,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:37:13,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:13,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:37:13,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:37:13,617 INFO L87 Difference]: Start difference. First operand 350 states and 475 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:13,919 INFO L93 Difference]: Finished difference Result 374 states and 500 transitions. [2022-04-06 20:37:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:37:13,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:37:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:13,922 INFO L225 Difference]: With dead ends: 374 [2022-04-06 20:37:13,922 INFO L226 Difference]: Without dead ends: 349 [2022-04-06 20:37:13,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:37:13,923 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:13,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 64 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-04-06 20:37:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 344. [2022-04-06 20:37:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 339 states have (on average 1.368731563421829) internal successors, (464), 339 states have internal predecessors, (464), 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 20:37:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 468 transitions. [2022-04-06 20:37:14,028 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 468 transitions. Word has length 36 [2022-04-06 20:37:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:14,028 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 468 transitions. [2022-04-06 20:37:14,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 468 transitions. [2022-04-06 20:37:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:14,029 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:14,029 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:14,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:14,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-06 20:37:14,243 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:14,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:14,244 INFO L85 PathProgramCache]: Analyzing trace with hash 382085168, now seen corresponding path program 25 times [2022-04-06 20:37:14,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:14,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [581836556] [2022-04-06 20:37:14,244 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:14,244 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:14,244 INFO L85 PathProgramCache]: Analyzing trace with hash 382085168, now seen corresponding path program 26 times [2022-04-06 20:37:14,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:14,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198425487] [2022-04-06 20:37:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:14,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:37:14,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:14,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198425487] [2022-04-06 20:37:14,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198425487] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:14,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301977412] [2022-04-06 20:37:14,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:14,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:14,430 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:14,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:37:14,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:14,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:37:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:37:14,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:37:15,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301977412] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:15,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:15,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 39 [2022-04-06 20:37:15,075 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:15,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [581836556] [2022-04-06 20:37:15,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [581836556] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:15,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:15,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:37:15,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579409487] [2022-04-06 20:37:15,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:15,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:37:15,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:15,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:37:15,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:37:15,079 INFO L87 Difference]: Start difference. First operand 344 states and 468 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:15,716 INFO L93 Difference]: Finished difference Result 400 states and 553 transitions. [2022-04-06 20:37:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:37:15,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:37:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:15,717 INFO L225 Difference]: With dead ends: 400 [2022-04-06 20:37:15,717 INFO L226 Difference]: Without dead ends: 395 [2022-04-06 20:37:15,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:37:15,718 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 82 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:15,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-04-06 20:37:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 382. [2022-04-06 20:37:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.3740053050397878) internal successors, (518), 377 states have internal predecessors, (518), 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 20:37:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 522 transitions. [2022-04-06 20:37:15,838 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 522 transitions. Word has length 36 [2022-04-06 20:37:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:15,839 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 522 transitions. [2022-04-06 20:37:15,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 522 transitions. [2022-04-06 20:37:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:15,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:15,839 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:15,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-06 20:37:16,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:16,040 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash 500352545, now seen corresponding path program 41 times [2022-04-06 20:37:16,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:16,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1912877526] [2022-04-06 20:37:16,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:16,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash 500352545, now seen corresponding path program 42 times [2022-04-06 20:37:16,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:16,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052994451] [2022-04-06 20:37:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:16,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:16,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:16,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052994451] [2022-04-06 20:37:16,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052994451] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:16,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562044201] [2022-04-06 20:37:16,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:16,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:16,338 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:16,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:37:16,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 20:37:16,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:16,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:37:16,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:16,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:17,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562044201] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:17,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:17,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:37:17,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:17,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1912877526] [2022-04-06 20:37:17,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1912877526] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:17,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:17,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:37:17,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853038732] [2022-04-06 20:37:17,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:17,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:37:17,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:17,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:37:17,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:37:17,458 INFO L87 Difference]: Start difference. First operand 382 states and 522 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:19,365 INFO L93 Difference]: Finished difference Result 674 states and 1031 transitions. [2022-04-06 20:37:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:37:19,366 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:37:19,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:19,367 INFO L225 Difference]: With dead ends: 674 [2022-04-06 20:37:19,367 INFO L226 Difference]: Without dead ends: 646 [2022-04-06 20:37:19,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1183, Invalid=4073, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:37:19,368 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 169 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4027 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 4149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:19,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 217 Invalid, 4149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4027 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:37:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-04-06 20:37:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 401. [2022-04-06 20:37:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.378787878787879) internal successors, (546), 396 states have internal predecessors, (546), 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 20:37:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 550 transitions. [2022-04-06 20:37:19,497 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 550 transitions. Word has length 36 [2022-04-06 20:37:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:19,497 INFO L478 AbstractCegarLoop]: Abstraction has 401 states and 550 transitions. [2022-04-06 20:37:19,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 550 transitions. [2022-04-06 20:37:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:37:19,498 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:19,498 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:19,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:19,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:19,698 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1873101146, now seen corresponding path program 55 times [2022-04-06 20:37:19,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:19,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2134370164] [2022-04-06 20:37:19,699 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:19,699 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1873101146, now seen corresponding path program 56 times [2022-04-06 20:37:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:19,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991423011] [2022-04-06 20:37:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:19,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:19,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 20:37:19,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:19,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991423011] [2022-04-06 20:37:19,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991423011] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:19,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857703310] [2022-04-06 20:37:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:19,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:19,843 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:19,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:37:19,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:19,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:19,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:37:19,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 20:37:20,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 20:37:20,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857703310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:20,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:20,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12] total 31 [2022-04-06 20:37:20,272 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2134370164] [2022-04-06 20:37:20,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2134370164] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:20,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:20,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:20,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858521137] [2022-04-06 20:37:20,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:20,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:20,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:20,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:20,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:37:20,273 INFO L87 Difference]: Start difference. First operand 401 states and 550 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:21,001 INFO L93 Difference]: Finished difference Result 486 states and 642 transitions. [2022-04-06 20:37:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:37:21,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:37:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:21,002 INFO L225 Difference]: With dead ends: 486 [2022-04-06 20:37:21,002 INFO L226 Difference]: Without dead ends: 468 [2022-04-06 20:37:21,003 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:37:21,003 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:21,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 78 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-04-06 20:37:21,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 401. [2022-04-06 20:37:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.3762626262626263) internal successors, (545), 396 states have internal predecessors, (545), 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 20:37:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 549 transitions. [2022-04-06 20:37:21,132 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 549 transitions. Word has length 37 [2022-04-06 20:37:21,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:21,132 INFO L478 AbstractCegarLoop]: Abstraction has 401 states and 549 transitions. [2022-04-06 20:37:21,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 549 transitions. [2022-04-06 20:37:21,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:37:21,133 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:21,133 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:21,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 20:37:21,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 20:37:21,339 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1394492966, now seen corresponding path program 27 times [2022-04-06 20:37:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:21,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [447661943] [2022-04-06 20:37:21,340 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:21,340 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:21,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1394492966, now seen corresponding path program 28 times [2022-04-06 20:37:21,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:21,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241189152] [2022-04-06 20:37:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:21,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:21,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:37:21,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:21,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241189152] [2022-04-06 20:37:21,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241189152] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:21,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770669061] [2022-04-06 20:37:21,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:21,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:21,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:21,526 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:21,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:37:21,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:21,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:37:21,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:37:21,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:37:22,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770669061] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:22,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:22,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-04-06 20:37:22,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:22,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [447661943] [2022-04-06 20:37:22,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [447661943] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:22,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:22,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:37:22,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539774444] [2022-04-06 20:37:22,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:22,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:37:22,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:37:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:37:22,163 INFO L87 Difference]: Start difference. First operand 401 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:37:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:23,280 INFO L93 Difference]: Finished difference Result 481 states and 634 transitions. [2022-04-06 20:37:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:37:23,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 37 [2022-04-06 20:37:23,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:23,282 INFO L225 Difference]: With dead ends: 481 [2022-04-06 20:37:23,282 INFO L226 Difference]: Without dead ends: 438 [2022-04-06 20:37:23,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1190, Invalid=6820, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:37:23,283 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:23,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 103 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-04-06 20:37:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 400. [2022-04-06 20:37:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.3670886075949367) internal successors, (540), 395 states have internal predecessors, (540), 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 20:37:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 544 transitions. [2022-04-06 20:37:23,412 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 544 transitions. Word has length 37 [2022-04-06 20:37:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:23,412 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 544 transitions. [2022-04-06 20:37:23,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:37:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 544 transitions. [2022-04-06 20:37:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:37:23,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:23,413 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:23,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-06 20:37:23,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-04-06 20:37:23,614 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:23,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1905915000, now seen corresponding path program 57 times [2022-04-06 20:37:23,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:23,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [944551737] [2022-04-06 20:37:23,615 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:23,615 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1905915000, now seen corresponding path program 58 times [2022-04-06 20:37:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:23,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620526184] [2022-04-06 20:37:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:23,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:37:23,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620526184] [2022-04-06 20:37:23,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620526184] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723560034] [2022-04-06 20:37:23,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:23,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:23,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:23,756 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:23,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:37:23,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:23,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:23,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:37:23,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:37:23,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:37:24,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723560034] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:24,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:24,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:37:24,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:24,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [944551737] [2022-04-06 20:37:24,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [944551737] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:24,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:24,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:24,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562102632] [2022-04-06 20:37:24,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:24,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:24,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:24,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:24,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:37:24,107 INFO L87 Difference]: Start difference. First operand 400 states and 544 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:24,863 INFO L93 Difference]: Finished difference Result 505 states and 657 transitions. [2022-04-06 20:37:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:37:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:37:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:24,865 INFO L225 Difference]: With dead ends: 505 [2022-04-06 20:37:24,865 INFO L226 Difference]: Without dead ends: 487 [2022-04-06 20:37:24,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=454, Invalid=1802, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:37:24,865 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 42 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:24,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 104 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-04-06 20:37:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 400. [2022-04-06 20:37:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.3645569620253164) internal successors, (539), 395 states have internal predecessors, (539), 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 20:37:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 543 transitions. [2022-04-06 20:37:24,997 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 543 transitions. Word has length 37 [2022-04-06 20:37:24,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:24,997 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 543 transitions. [2022-04-06 20:37:24,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:24,997 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 543 transitions. [2022-04-06 20:37:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:37:24,998 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:24,998 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:25,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 20:37:25,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:25,199 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:25,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1335082086, now seen corresponding path program 59 times [2022-04-06 20:37:25,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:25,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335180418] [2022-04-06 20:37:25,200 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:25,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1335082086, now seen corresponding path program 60 times [2022-04-06 20:37:25,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:25,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764455039] [2022-04-06 20:37:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:25,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:25,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 20:37:25,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:25,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764455039] [2022-04-06 20:37:25,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764455039] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:25,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035809803] [2022-04-06 20:37:25,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:25,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:25,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:25,334 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:25,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:37:25,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:37:25,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:37:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 20:37:25,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 20:37:25,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035809803] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:25,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:25,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:37:25,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:25,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335180418] [2022-04-06 20:37:25,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335180418] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:25,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:25,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:25,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170372572] [2022-04-06 20:37:25,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:25,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:25,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:25,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:37:25,786 INFO L87 Difference]: Start difference. First operand 400 states and 543 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:26,630 INFO L93 Difference]: Finished difference Result 526 states and 678 transitions. [2022-04-06 20:37:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:37:26,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:37:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:26,632 INFO L225 Difference]: With dead ends: 526 [2022-04-06 20:37:26,632 INFO L226 Difference]: Without dead ends: 508 [2022-04-06 20:37:26,632 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=426, Invalid=1644, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:37:26,632 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 51 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:26,632 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 109 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-04-06 20:37:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 400. [2022-04-06 20:37:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.3620253164556961) internal successors, (538), 395 states have internal predecessors, (538), 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 20:37:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 542 transitions. [2022-04-06 20:37:26,760 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 542 transitions. Word has length 37 [2022-04-06 20:37:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:26,760 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 542 transitions. [2022-04-06 20:37:26,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 542 transitions. [2022-04-06 20:37:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:37:26,761 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:26,761 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:26,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 20:37:26,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 20:37:26,975 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:26,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:26,975 INFO L85 PathProgramCache]: Analyzing trace with hash 208289464, now seen corresponding path program 61 times [2022-04-06 20:37:26,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:26,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569038265] [2022-04-06 20:37:26,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:26,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:26,977 INFO L85 PathProgramCache]: Analyzing trace with hash 208289464, now seen corresponding path program 62 times [2022-04-06 20:37:26,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:26,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169906878] [2022-04-06 20:37:26,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:26,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:27,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:37:27,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169906878] [2022-04-06 20:37:27,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169906878] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331901681] [2022-04-06 20:37:27,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:27,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:27,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:27,130 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:27,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:37:27,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:27,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:27,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:37:27,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:37:27,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:37:27,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331901681] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:27,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:27,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:37:27,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:27,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569038265] [2022-04-06 20:37:27,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569038265] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:27,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:27,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531791776] [2022-04-06 20:37:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:27,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:27,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:37:27,538 INFO L87 Difference]: Start difference. First operand 400 states and 542 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:28,320 INFO L93 Difference]: Finished difference Result 548 states and 700 transitions. [2022-04-06 20:37:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:37:28,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:37:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:28,322 INFO L225 Difference]: With dead ends: 548 [2022-04-06 20:37:28,322 INFO L226 Difference]: Without dead ends: 530 [2022-04-06 20:37:28,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:37:28,322 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 63 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:28,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 108 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-04-06 20:37:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 400. [2022-04-06 20:37:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.3594936708860759) internal successors, (537), 395 states have internal predecessors, (537), 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 20:37:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 541 transitions. [2022-04-06 20:37:28,454 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 541 transitions. Word has length 37 [2022-04-06 20:37:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:28,454 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 541 transitions. [2022-04-06 20:37:28,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 541 transitions. [2022-04-06 20:37:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:37:28,455 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:28,455 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:28,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:28,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:37:28,667 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash -632235336, now seen corresponding path program 43 times [2022-04-06 20:37:28,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:28,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2029043889] [2022-04-06 20:37:28,668 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:28,668 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash -632235336, now seen corresponding path program 44 times [2022-04-06 20:37:28,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:28,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872976212] [2022-04-06 20:37:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:28,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:28,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:28,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:28,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872976212] [2022-04-06 20:37:28,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872976212] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:28,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372044098] [2022-04-06 20:37:28,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:28,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:28,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:28,990 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:28,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:37:29,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:29,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:29,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:37:29,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:29,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:29,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372044098] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:29,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:29,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:37:29,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:29,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2029043889] [2022-04-06 20:37:29,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2029043889] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:29,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:29,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:37:29,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782711295] [2022-04-06 20:37:29,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:29,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:37:29,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:37:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:37:29,871 INFO L87 Difference]: Start difference. First operand 400 states and 541 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 20:37:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:31,963 INFO L93 Difference]: Finished difference Result 702 states and 1069 transitions. [2022-04-06 20:37:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:37:31,963 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 20:37:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:31,964 INFO L225 Difference]: With dead ends: 702 [2022-04-06 20:37:31,965 INFO L226 Difference]: Without dead ends: 674 [2022-04-06 20:37:31,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1282, Invalid=4418, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:37:31,965 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 173 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4465 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:31,965 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 229 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4465 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:37:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-04-06 20:37:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 419. [2022-04-06 20:37:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 414 states have (on average 1.3647342995169083) internal successors, (565), 414 states have internal predecessors, (565), 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 20:37:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 569 transitions. [2022-04-06 20:37:32,101 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 569 transitions. Word has length 37 [2022-04-06 20:37:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:32,101 INFO L478 AbstractCegarLoop]: Abstraction has 419 states and 569 transitions. [2022-04-06 20:37:32,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 20:37:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 569 transitions. [2022-04-06 20:37:32,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:37:32,102 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:32,102 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:32,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 20:37:32,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:37:32,302 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:32,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1382721279, now seen corresponding path program 45 times [2022-04-06 20:37:32,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:32,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1914575206] [2022-04-06 20:37:32,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:32,303 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:32,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1382721279, now seen corresponding path program 46 times [2022-04-06 20:37:32,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:32,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091635868] [2022-04-06 20:37:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:32,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:32,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:32,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:32,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091635868] [2022-04-06 20:37:32,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091635868] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:32,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808929559] [2022-04-06 20:37:32,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:32,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:32,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:32,634 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:32,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:37:32,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:32,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:32,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:37:32,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:32,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:33,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808929559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:33,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:33,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:37:33,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:33,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1914575206] [2022-04-06 20:37:33,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1914575206] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:33,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:33,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:37:33,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395139489] [2022-04-06 20:37:33,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:33,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:37:33,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:37:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:37:33,559 INFO L87 Difference]: Start difference. First operand 419 states and 569 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:35,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:35,812 INFO L93 Difference]: Finished difference Result 731 states and 1116 transitions. [2022-04-06 20:37:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:37:35,812 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:37:35,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:35,814 INFO L225 Difference]: With dead ends: 731 [2022-04-06 20:37:35,814 INFO L226 Difference]: Without dead ends: 703 [2022-04-06 20:37:35,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1385, Invalid=4777, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:37:35,815 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 188 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4825 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 4960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 4825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:35,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 237 Invalid, 4960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 4825 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:37:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-04-06 20:37:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 438. [2022-04-06 20:37:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 433 states have (on average 1.369515011547344) internal successors, (593), 433 states have internal predecessors, (593), 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 20:37:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 597 transitions. [2022-04-06 20:37:35,966 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 597 transitions. Word has length 38 [2022-04-06 20:37:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:35,966 INFO L478 AbstractCegarLoop]: Abstraction has 438 states and 597 transitions. [2022-04-06 20:37:35,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 597 transitions. [2022-04-06 20:37:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:37:35,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:35,967 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:35,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-06 20:37:36,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-04-06 20:37:36,167 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1036634024, now seen corresponding path program 63 times [2022-04-06 20:37:36,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:36,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015980114] [2022-04-06 20:37:36,168 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:36,168 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1036634024, now seen corresponding path program 64 times [2022-04-06 20:37:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:36,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507449171] [2022-04-06 20:37:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:38,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:37:38,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:38,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507449171] [2022-04-06 20:37:38,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507449171] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:38,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080502476] [2022-04-06 20:37:38,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:38,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:38,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:38,626 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:38,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:37:38,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:38,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:38,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:37:38,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:43,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:37:45,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080502476] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:45,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:45,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 18] total 53 [2022-04-06 20:37:45,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:45,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015980114] [2022-04-06 20:37:45,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015980114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:45,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:45,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:37:45,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472446324] [2022-04-06 20:37:45,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:45,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:37:45,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:45,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:37:45,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=2429, Unknown=1, NotChecked=0, Total=2756 [2022-04-06 20:37:45,785 INFO L87 Difference]: Start difference. First operand 438 states and 597 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 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 20:37:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:47,593 INFO L93 Difference]: Finished difference Result 457 states and 616 transitions. [2022-04-06 20:37:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:37:47,593 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:37:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:47,595 INFO L225 Difference]: With dead ends: 457 [2022-04-06 20:37:47,595 INFO L226 Difference]: Without dead ends: 452 [2022-04-06 20:37:47,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=485, Invalid=4484, Unknown=1, NotChecked=0, Total=4970 [2022-04-06 20:37:47,595 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:47,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 103 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:37:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-04-06 20:37:47,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2022-04-06 20:37:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 433 states have (on average 1.369515011547344) internal successors, (593), 433 states have internal predecessors, (593), 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 20:37:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 597 transitions. [2022-04-06 20:37:47,747 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 597 transitions. Word has length 39 [2022-04-06 20:37:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:47,747 INFO L478 AbstractCegarLoop]: Abstraction has 438 states and 597 transitions. [2022-04-06 20:37:47,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 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 20:37:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 597 transitions. [2022-04-06 20:37:47,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:37:47,748 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:47,748 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:47,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:47,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:47,963 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash -731553192, now seen corresponding path program 65 times [2022-04-06 20:37:47,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:47,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1973227291] [2022-04-06 20:37:47,964 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:47,964 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:47,965 INFO L85 PathProgramCache]: Analyzing trace with hash -731553192, now seen corresponding path program 66 times [2022-04-06 20:37:47,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:47,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65075755] [2022-04-06 20:37:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:47,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:48,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:37:48,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:48,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65075755] [2022-04-06 20:37:48,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65075755] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:48,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129057821] [2022-04-06 20:37:48,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:48,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:48,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:48,104 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:48,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:37:48,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:37:48,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:48,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:37:48,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:37:48,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:37:48,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129057821] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:48,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:48,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:37:48,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:48,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1973227291] [2022-04-06 20:37:48,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1973227291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:48,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:48,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:37:48,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688862145] [2022-04-06 20:37:48,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:48,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:37:48,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:48,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:37:48,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:37:48,530 INFO L87 Difference]: Start difference. First operand 438 states and 597 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 20:37:49,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:49,318 INFO L93 Difference]: Finished difference Result 530 states and 697 transitions. [2022-04-06 20:37:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:37:49,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 39 [2022-04-06 20:37:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:49,319 INFO L225 Difference]: With dead ends: 530 [2022-04-06 20:37:49,319 INFO L226 Difference]: Without dead ends: 511 [2022-04-06 20:37:49,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=2219, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:37:49,320 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:49,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 90 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-04-06 20:37:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 438. [2022-04-06 20:37:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 433 states have (on average 1.3672055427251733) internal successors, (592), 433 states have internal predecessors, (592), 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 20:37:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 596 transitions. [2022-04-06 20:37:49,467 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 596 transitions. Word has length 39 [2022-04-06 20:37:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:49,467 INFO L478 AbstractCegarLoop]: Abstraction has 438 states and 596 transitions. [2022-04-06 20:37:49,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 20:37:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 596 transitions. [2022-04-06 20:37:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:37:49,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:49,468 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:49,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-04-06 20:37:49,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:49,669 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash -73295272, now seen corresponding path program 29 times [2022-04-06 20:37:49,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:49,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [92806520] [2022-04-06 20:37:49,670 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:49,670 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:49,670 INFO L85 PathProgramCache]: Analyzing trace with hash -73295272, now seen corresponding path program 30 times [2022-04-06 20:37:49,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:49,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483616140] [2022-04-06 20:37:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:49,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:49,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:37:49,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:49,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483616140] [2022-04-06 20:37:49,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483616140] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:49,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180979266] [2022-04-06 20:37:49,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:49,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:49,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:49,857 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:49,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:37:49,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:37:49,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:49,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:37:49,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:37:50,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:37:50,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180979266] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:50,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:50,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 36 [2022-04-06 20:37:50,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:50,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [92806520] [2022-04-06 20:37:50,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [92806520] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:50,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:50,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:37:50,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911290460] [2022-04-06 20:37:50,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:50,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:37:50,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:37:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:37:50,331 INFO L87 Difference]: Start difference. First operand 438 states and 596 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:37:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:51,119 INFO L93 Difference]: Finished difference Result 515 states and 706 transitions. [2022-04-06 20:37:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:37:51,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have 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 20:37:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:51,120 INFO L225 Difference]: With dead ends: 515 [2022-04-06 20:37:51,120 INFO L226 Difference]: Without dead ends: 510 [2022-04-06 20:37:51,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=594, Invalid=2058, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:37:51,121 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:51,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 51 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-04-06 20:37:51,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 481. [2022-04-06 20:37:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 476 states have (on average 1.3718487394957983) internal successors, (653), 476 states have internal predecessors, (653), 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 20:37:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 657 transitions. [2022-04-06 20:37:51,294 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 657 transitions. Word has length 39 [2022-04-06 20:37:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:51,294 INFO L478 AbstractCegarLoop]: Abstraction has 481 states and 657 transitions. [2022-04-06 20:37:51,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:37:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 657 transitions. [2022-04-06 20:37:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:37:51,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:51,295 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:51,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 20:37:51,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:51,495 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:51,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1172865272, now seen corresponding path program 67 times [2022-04-06 20:37:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:51,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1502695025] [2022-04-06 20:37:51,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:51,496 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1172865272, now seen corresponding path program 68 times [2022-04-06 20:37:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:51,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982009115] [2022-04-06 20:37:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:51,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:51,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 20:37:51,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:51,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982009115] [2022-04-06 20:37:51,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982009115] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:51,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376197615] [2022-04-06 20:37:51,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:51,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:51,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:51,655 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:51,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:37:51,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:51,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:51,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:37:51,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 20:37:51,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 20:37:52,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376197615] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:52,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:52,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:37:52,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:52,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1502695025] [2022-04-06 20:37:52,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1502695025] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:52,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:52,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:37:52,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235146129] [2022-04-06 20:37:52,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:52,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:37:52,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:37:52,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:37:52,057 INFO L87 Difference]: Start difference. First operand 481 states and 657 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 20:37:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:52,983 INFO L93 Difference]: Finished difference Result 612 states and 797 transitions. [2022-04-06 20:37:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:37:52,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 39 [2022-04-06 20:37:52,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:52,985 INFO L225 Difference]: With dead ends: 612 [2022-04-06 20:37:52,985 INFO L226 Difference]: Without dead ends: 593 [2022-04-06 20:37:52,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=529, Invalid=2123, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:37:52,986 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 51 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:52,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 101 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-04-06 20:37:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 481. [2022-04-06 20:37:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 476 states have (on average 1.3697478991596639) internal successors, (652), 476 states have internal predecessors, (652), 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 20:37:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 656 transitions. [2022-04-06 20:37:53,157 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 656 transitions. Word has length 39 [2022-04-06 20:37:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:53,157 INFO L478 AbstractCegarLoop]: Abstraction has 481 states and 656 transitions. [2022-04-06 20:37:53,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 20:37:53,157 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 656 transitions. [2022-04-06 20:37:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:37:53,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:53,157 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:53,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:53,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-04-06 20:37:53,358 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash 475466840, now seen corresponding path program 69 times [2022-04-06 20:37:53,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:53,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [984330734] [2022-04-06 20:37:53,359 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:53,359 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:53,359 INFO L85 PathProgramCache]: Analyzing trace with hash 475466840, now seen corresponding path program 70 times [2022-04-06 20:37:53,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:53,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419348451] [2022-04-06 20:37:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:53,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:53,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:37:53,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:53,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419348451] [2022-04-06 20:37:53,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419348451] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:53,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67839547] [2022-04-06 20:37:53,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:53,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:53,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:53,497 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:53,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:37:53,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:53,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:53,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:37:53,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:37:53,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:37:53,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67839547] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:53,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:53,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:37:53,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [984330734] [2022-04-06 20:37:53,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [984330734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:53,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:53,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:37:53,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021868363] [2022-04-06 20:37:53,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:53,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:37:53,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:53,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:37:53,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:37:53,880 INFO L87 Difference]: Start difference. First operand 481 states and 656 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 20:37:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:54,862 INFO L93 Difference]: Finished difference Result 635 states and 820 transitions. [2022-04-06 20:37:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:37:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 39 [2022-04-06 20:37:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:54,864 INFO L225 Difference]: With dead ends: 635 [2022-04-06 20:37:54,864 INFO L226 Difference]: Without dead ends: 616 [2022-04-06 20:37:54,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:37:54,865 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 60 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:54,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 112 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-04-06 20:37:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 481. [2022-04-06 20:37:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 476 states have (on average 1.3676470588235294) internal successors, (651), 476 states have internal predecessors, (651), 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 20:37:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 655 transitions. [2022-04-06 20:37:55,038 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 655 transitions. Word has length 39 [2022-04-06 20:37:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:55,038 INFO L478 AbstractCegarLoop]: Abstraction has 481 states and 655 transitions. [2022-04-06 20:37:55,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 20:37:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 655 transitions. [2022-04-06 20:37:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:37:55,038 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:55,039 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:55,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:55,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:55,251 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:55,252 INFO L85 PathProgramCache]: Analyzing trace with hash 944280840, now seen corresponding path program 71 times [2022-04-06 20:37:55,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:55,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640569028] [2022-04-06 20:37:55,252 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:55,253 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash 944280840, now seen corresponding path program 72 times [2022-04-06 20:37:55,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:55,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255486764] [2022-04-06 20:37:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:55,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:55,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:37:55,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:55,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255486764] [2022-04-06 20:37:55,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255486764] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:55,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305654367] [2022-04-06 20:37:55,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:55,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:55,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:55,427 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:55,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:37:55,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:37:55,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:37:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:37:55,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:37:55,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305654367] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:55,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:55,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2022-04-06 20:37:55,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640569028] [2022-04-06 20:37:55,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640569028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:55,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:55,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:37:55,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376417716] [2022-04-06 20:37:55,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:55,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:37:55,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:37:55,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:37:55,688 INFO L87 Difference]: Start difference. First operand 481 states and 655 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 20:37:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:56,744 INFO L93 Difference]: Finished difference Result 659 states and 844 transitions. [2022-04-06 20:37:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:37:56,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 39 [2022-04-06 20:37:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:56,761 INFO L225 Difference]: With dead ends: 659 [2022-04-06 20:37:56,761 INFO L226 Difference]: Without dead ends: 640 [2022-04-06 20:37:56,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:37:56,762 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 72 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:56,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 118 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-04-06 20:37:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 481. [2022-04-06 20:37:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 476 states have (on average 1.365546218487395) internal successors, (650), 476 states have internal predecessors, (650), 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 20:37:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 654 transitions. [2022-04-06 20:37:56,939 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 654 transitions. Word has length 39 [2022-04-06 20:37:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:56,940 INFO L478 AbstractCegarLoop]: Abstraction has 481 states and 654 transitions. [2022-04-06 20:37:56,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 20:37:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 654 transitions. [2022-04-06 20:37:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:37:56,940 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:56,940 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:56,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 20:37:57,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:57,141 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1122018264, now seen corresponding path program 47 times [2022-04-06 20:37:57,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:57,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752275617] [2022-04-06 20:37:57,142 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:57,142 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1122018264, now seen corresponding path program 48 times [2022-04-06 20:37:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:57,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847016430] [2022-04-06 20:37:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:57,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:57,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:57,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:57,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847016430] [2022-04-06 20:37:57,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847016430] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:57,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137251283] [2022-04-06 20:37:57,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:57,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:57,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:57,490 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:57,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:37:58,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 20:37:58,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:58,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:37:58,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:58,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:59,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137251283] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:59,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:59,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:37:59,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:59,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752275617] [2022-04-06 20:37:59,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752275617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:59,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:59,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:37:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764259782] [2022-04-06 20:37:59,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:59,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:37:59,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:37:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=2344, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:37:59,053 INFO L87 Difference]: Start difference. First operand 481 states and 654 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 20:38:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:01,643 INFO L93 Difference]: Finished difference Result 839 states and 1283 transitions. [2022-04-06 20:38:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:38:01,643 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 20:38:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:01,645 INFO L225 Difference]: With dead ends: 839 [2022-04-06 20:38:01,645 INFO L226 Difference]: Without dead ends: 809 [2022-04-06 20:38:01,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1492, Invalid=5150, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:38:01,645 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 193 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5251 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 5388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 5251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:01,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 247 Invalid, 5388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 5251 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:38:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-04-06 20:38:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 502. [2022-04-06 20:38:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 497 states have (on average 1.3702213279678068) internal successors, (681), 497 states have internal predecessors, (681), 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 20:38:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 685 transitions. [2022-04-06 20:38:01,830 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 685 transitions. Word has length 39 [2022-04-06 20:38:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:01,830 INFO L478 AbstractCegarLoop]: Abstraction has 502 states and 685 transitions. [2022-04-06 20:38:01,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 20:38:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 685 transitions. [2022-04-06 20:38:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:01,831 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:01,831 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:01,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 20:38:02,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 20:38:02,035 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2036388576, now seen corresponding path program 73 times [2022-04-06 20:38:02,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:02,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [686849241] [2022-04-06 20:38:02,036 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:02,036 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:02,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2036388576, now seen corresponding path program 74 times [2022-04-06 20:38:02,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:02,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863830380] [2022-04-06 20:38:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:02,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:02,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:02,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:02,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863830380] [2022-04-06 20:38:02,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863830380] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:02,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434827845] [2022-04-06 20:38:02,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:02,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:02,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:02,125 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:02,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:38:02,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:02,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:38:02,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:02,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:02,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434827845] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:02,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:02,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-04-06 20:38:02,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:02,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [686849241] [2022-04-06 20:38:02,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [686849241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:02,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:02,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:38:02,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175860973] [2022-04-06 20:38:02,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:02,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:38:02,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:38:02,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:38:02,291 INFO L87 Difference]: Start difference. First operand 502 states and 685 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:02,748 INFO L93 Difference]: Finished difference Result 529 states and 713 transitions. [2022-04-06 20:38:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:38:02,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:38:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:02,750 INFO L225 Difference]: With dead ends: 529 [2022-04-06 20:38:02,750 INFO L226 Difference]: Without dead ends: 501 [2022-04-06 20:38:02,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:38:02,750 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:02,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 72 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-04-06 20:38:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 495. [2022-04-06 20:38:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 490 states have (on average 1.373469387755102) internal successors, (673), 490 states have internal predecessors, (673), 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 20:38:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 677 transitions. [2022-04-06 20:38:02,946 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 677 transitions. Word has length 40 [2022-04-06 20:38:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:02,946 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 677 transitions. [2022-04-06 20:38:02,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 677 transitions. [2022-04-06 20:38:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:02,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:02,947 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:02,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 20:38:03,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-04-06 20:38:03,148 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash 20764672, now seen corresponding path program 31 times [2022-04-06 20:38:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:03,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2003004345] [2022-04-06 20:38:03,149 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:03,149 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash 20764672, now seen corresponding path program 32 times [2022-04-06 20:38:03,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:03,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740726835] [2022-04-06 20:38:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:03,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:38:03,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:03,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740726835] [2022-04-06 20:38:03,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740726835] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:03,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693587518] [2022-04-06 20:38:03,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:03,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:03,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:03,358 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:03,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:38:03,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:03,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:03,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:38:03,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:38:03,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:38:04,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693587518] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:04,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:04,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-04-06 20:38:04,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:04,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2003004345] [2022-04-06 20:38:04,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2003004345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:04,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:04,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:38:04,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583584448] [2022-04-06 20:38:04,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:04,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:38:04,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:04,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:38:04,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1902, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:38:04,124 INFO L87 Difference]: Start difference. First operand 495 states and 677 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:38:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:05,561 INFO L93 Difference]: Finished difference Result 593 states and 780 transitions. [2022-04-06 20:38:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:38:05,562 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 40 [2022-04-06 20:38:05,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:05,563 INFO L225 Difference]: With dead ends: 593 [2022-04-06 20:38:05,563 INFO L226 Difference]: Without dead ends: 536 [2022-04-06 20:38:05,563 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1488, Invalid=8814, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:38:05,564 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:05,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 113 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-04-06 20:38:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 494. [2022-04-06 20:38:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 489 states have (on average 1.3640081799591002) internal successors, (667), 489 states have internal predecessors, (667), 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 20:38:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 671 transitions. [2022-04-06 20:38:05,759 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 671 transitions. Word has length 40 [2022-04-06 20:38:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:05,759 INFO L478 AbstractCegarLoop]: Abstraction has 494 states and 671 transitions. [2022-04-06 20:38:05,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:38:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 671 transitions. [2022-04-06 20:38:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:05,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:05,760 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:05,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-06 20:38:05,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:05,961 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:05,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1459532769, now seen corresponding path program 49 times [2022-04-06 20:38:05,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:05,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [43228937] [2022-04-06 20:38:05,962 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:05,962 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:05,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1459532769, now seen corresponding path program 50 times [2022-04-06 20:38:05,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:05,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657136770] [2022-04-06 20:38:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:05,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:06,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:06,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:06,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657136770] [2022-04-06 20:38:06,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657136770] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:06,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751701250] [2022-04-06 20:38:06,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:06,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:06,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:06,325 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:06,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:38:06,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:06,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:38:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:06,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:07,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751701250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:07,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:07,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:38:07,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:07,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [43228937] [2022-04-06 20:38:07,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [43228937] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:07,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:07,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:38:07,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874938553] [2022-04-06 20:38:07,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:07,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:38:07,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:07,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:38:07,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=2515, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:38:07,415 INFO L87 Difference]: Start difference. First operand 494 states and 671 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:10,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:10,123 INFO L93 Difference]: Finished difference Result 865 states and 1323 transitions. [2022-04-06 20:38:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:38:10,123 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:38:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:10,125 INFO L225 Difference]: With dead ends: 865 [2022-04-06 20:38:10,125 INFO L226 Difference]: Without dead ends: 834 [2022-04-06 20:38:10,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1603, Invalid=5537, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:38:10,126 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 196 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 5590 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 5732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 5590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:10,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 254 Invalid, 5732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 5590 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:38:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-04-06 20:38:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 515. [2022-04-06 20:38:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.3686274509803922) internal successors, (698), 510 states have internal predecessors, (698), 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 20:38:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 702 transitions. [2022-04-06 20:38:10,330 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 702 transitions. Word has length 40 [2022-04-06 20:38:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:10,330 INFO L478 AbstractCegarLoop]: Abstraction has 515 states and 702 transitions. [2022-04-06 20:38:10,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 702 transitions. [2022-04-06 20:38:10,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:38:10,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:10,331 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:10,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-06 20:38:10,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:10,532 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:10,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:10,532 INFO L85 PathProgramCache]: Analyzing trace with hash -335029466, now seen corresponding path program 75 times [2022-04-06 20:38:10,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:10,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569677241] [2022-04-06 20:38:10,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:10,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:10,533 INFO L85 PathProgramCache]: Analyzing trace with hash -335029466, now seen corresponding path program 76 times [2022-04-06 20:38:10,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:10,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887068221] [2022-04-06 20:38:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:10,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:10,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:38:10,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:10,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887068221] [2022-04-06 20:38:10,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887068221] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831150122] [2022-04-06 20:38:10,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:10,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:10,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:10,691 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:10,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:38:10,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:10,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:10,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:38:10,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:38:10,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:38:11,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831150122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:11,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:11,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:38:11,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:11,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569677241] [2022-04-06 20:38:11,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569677241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:11,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:11,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:38:11,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308166606] [2022-04-06 20:38:11,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:11,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:38:11,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:11,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:38:11,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:38:11,124 INFO L87 Difference]: Start difference. First operand 515 states and 702 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:12,192 INFO L93 Difference]: Finished difference Result 633 states and 829 transitions. [2022-04-06 20:38:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:38:12,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:38:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:12,193 INFO L225 Difference]: With dead ends: 633 [2022-04-06 20:38:12,193 INFO L226 Difference]: Without dead ends: 613 [2022-04-06 20:38:12,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=600, Invalid=2480, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:38:12,197 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 43 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:12,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 116 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-04-06 20:38:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 515. [2022-04-06 20:38:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.3666666666666667) internal successors, (697), 510 states have internal predecessors, (697), 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 20:38:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 701 transitions. [2022-04-06 20:38:12,396 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 701 transitions. Word has length 41 [2022-04-06 20:38:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:12,397 INFO L478 AbstractCegarLoop]: Abstraction has 515 states and 701 transitions. [2022-04-06 20:38:12,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 701 transitions. [2022-04-06 20:38:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:38:12,397 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:12,397 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:12,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:12,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-04-06 20:38:12,614 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:12,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1537469624, now seen corresponding path program 77 times [2022-04-06 20:38:12,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:12,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1949744556] [2022-04-06 20:38:12,615 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:12,615 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1537469624, now seen corresponding path program 78 times [2022-04-06 20:38:12,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:12,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754412160] [2022-04-06 20:38:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:12,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:12,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:38:12,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:12,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754412160] [2022-04-06 20:38:12,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754412160] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:12,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541338566] [2022-04-06 20:38:12,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:12,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:12,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:12,784 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:12,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:38:12,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:38:12,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:12,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:38:12,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:38:13,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:38:13,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541338566] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:13,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:13,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:38:13,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:13,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1949744556] [2022-04-06 20:38:13,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1949744556] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:13,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:13,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:38:13,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720440920] [2022-04-06 20:38:13,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:13,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:38:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:13,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:38:13,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:38:13,382 INFO L87 Difference]: Start difference. First operand 515 states and 701 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:14,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:14,506 INFO L93 Difference]: Finished difference Result 656 states and 852 transitions. [2022-04-06 20:38:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:38:14,507 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:38:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:14,508 INFO L225 Difference]: With dead ends: 656 [2022-04-06 20:38:14,508 INFO L226 Difference]: Without dead ends: 636 [2022-04-06 20:38:14,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=2381, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:38:14,508 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 51 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:14,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 120 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-04-06 20:38:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 515. [2022-04-06 20:38:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.3647058823529412) internal successors, (696), 510 states have internal predecessors, (696), 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 20:38:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 700 transitions. [2022-04-06 20:38:14,709 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 700 transitions. Word has length 41 [2022-04-06 20:38:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:14,709 INFO L478 AbstractCegarLoop]: Abstraction has 515 states and 700 transitions. [2022-04-06 20:38:14,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 700 transitions. [2022-04-06 20:38:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:38:14,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:14,710 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:14,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:14,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:14,911 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1034526490, now seen corresponding path program 79 times [2022-04-06 20:38:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:14,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1291653816] [2022-04-06 20:38:14,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:14,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:14,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1034526490, now seen corresponding path program 80 times [2022-04-06 20:38:14,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:14,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411495374] [2022-04-06 20:38:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:14,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:15,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 20:38:15,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411495374] [2022-04-06 20:38:15,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411495374] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004252448] [2022-04-06 20:38:15,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:15,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:15,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:15,070 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:15,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:38:15,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:15,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:15,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:38:15,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 20:38:15,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 20:38:15,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004252448] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:15,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:15,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:38:15,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1291653816] [2022-04-06 20:38:15,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1291653816] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:15,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:15,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:38:15,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621049512] [2022-04-06 20:38:15,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:15,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:38:15,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:38:15,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:38:15,512 INFO L87 Difference]: Start difference. First operand 515 states and 700 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:16,646 INFO L93 Difference]: Finished difference Result 680 states and 876 transitions. [2022-04-06 20:38:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:38:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:38:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:16,648 INFO L225 Difference]: With dead ends: 680 [2022-04-06 20:38:16,648 INFO L226 Difference]: Without dead ends: 660 [2022-04-06 20:38:16,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=542, Invalid=2110, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:38:16,648 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:16,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 116 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-04-06 20:38:16,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 515. [2022-04-06 20:38:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.3627450980392157) internal successors, (695), 510 states have internal predecessors, (695), 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 20:38:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 699 transitions. [2022-04-06 20:38:16,854 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 699 transitions. Word has length 41 [2022-04-06 20:38:16,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:16,854 INFO L478 AbstractCegarLoop]: Abstraction has 515 states and 699 transitions. [2022-04-06 20:38:16,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:16,855 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 699 transitions. [2022-04-06 20:38:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:38:16,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:16,855 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:16,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 20:38:17,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:17,056 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1653452536, now seen corresponding path program 81 times [2022-04-06 20:38:17,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020835408] [2022-04-06 20:38:17,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:17,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:17,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1653452536, now seen corresponding path program 82 times [2022-04-06 20:38:17,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:17,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103430403] [2022-04-06 20:38:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:17,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:17,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:38:17,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103430403] [2022-04-06 20:38:17,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103430403] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802116799] [2022-04-06 20:38:17,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:17,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:17,210 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:17,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:38:17,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:17,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:17,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:38:17,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:38:17,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:38:17,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802116799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:17,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:17,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:38:17,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:17,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020835408] [2022-04-06 20:38:17,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020835408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:17,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:17,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:38:17,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028316600] [2022-04-06 20:38:17,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:17,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:38:17,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:38:17,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:38:17,677 INFO L87 Difference]: Start difference. First operand 515 states and 699 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:18,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:18,861 INFO L93 Difference]: Finished difference Result 705 states and 901 transitions. [2022-04-06 20:38:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:38:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:38:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:18,863 INFO L225 Difference]: With dead ends: 705 [2022-04-06 20:38:18,863 INFO L226 Difference]: Without dead ends: 685 [2022-04-06 20:38:18,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1926, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:38:18,863 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 73 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:18,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 130 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-04-06 20:38:19,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 515. [2022-04-06 20:38:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.3607843137254902) internal successors, (694), 510 states have internal predecessors, (694), 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 20:38:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 698 transitions. [2022-04-06 20:38:19,071 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 698 transitions. Word has length 41 [2022-04-06 20:38:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:19,071 INFO L478 AbstractCegarLoop]: Abstraction has 515 states and 698 transitions. [2022-04-06 20:38:19,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 698 transitions. [2022-04-06 20:38:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:38:19,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:19,072 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:19,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-06 20:38:19,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-04-06 20:38:19,272 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:19,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash -962419464, now seen corresponding path program 51 times [2022-04-06 20:38:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:19,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122420622] [2022-04-06 20:38:19,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:19,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:19,273 INFO L85 PathProgramCache]: Analyzing trace with hash -962419464, now seen corresponding path program 52 times [2022-04-06 20:38:19,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:19,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344185035] [2022-04-06 20:38:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:19,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:19,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:19,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344185035] [2022-04-06 20:38:19,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344185035] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450992598] [2022-04-06 20:38:19,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:19,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:19,654 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:19,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:38:19,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:19,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:38:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:19,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:20,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450992598] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:20,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:20,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:38:20,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:20,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122420622] [2022-04-06 20:38:20,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122420622] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:20,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:20,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:38:20,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60196457] [2022-04-06 20:38:20,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:20,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:38:20,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:38:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=848, Invalid=2692, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:38:20,776 INFO L87 Difference]: Start difference. First operand 515 states and 698 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 20:38:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:23,752 INFO L93 Difference]: Finished difference Result 897 states and 1371 transitions. [2022-04-06 20:38:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:38:23,752 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 20:38:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:23,754 INFO L225 Difference]: With dead ends: 897 [2022-04-06 20:38:23,754 INFO L226 Difference]: Without dead ends: 866 [2022-04-06 20:38:23,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1718, Invalid=5938, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:38:23,755 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 202 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 6049 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 6194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 6049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:23,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 264 Invalid, 6194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 6049 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:38:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-04-06 20:38:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 536. [2022-04-06 20:38:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 531 states have (on average 1.3653483992467044) internal successors, (725), 531 states have internal predecessors, (725), 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 20:38:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 729 transitions. [2022-04-06 20:38:23,970 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 729 transitions. Word has length 41 [2022-04-06 20:38:23,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:23,970 INFO L478 AbstractCegarLoop]: Abstraction has 536 states and 729 transitions. [2022-04-06 20:38:23,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 20:38:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 729 transitions. [2022-04-06 20:38:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:38:23,971 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:23,971 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:23,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:24,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:24,171 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash 14953136, now seen corresponding path program 33 times [2022-04-06 20:38:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:24,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [396628778] [2022-04-06 20:38:24,172 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:24,172 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash 14953136, now seen corresponding path program 34 times [2022-04-06 20:38:24,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:24,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799206269] [2022-04-06 20:38:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:24,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:38:24,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799206269] [2022-04-06 20:38:24,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799206269] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993927609] [2022-04-06 20:38:24,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:24,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:24,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:24,421 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:24,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:38:24,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:24,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:24,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:38:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:38:24,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:38:24,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993927609] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:24,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:24,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 30 [2022-04-06 20:38:24,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:24,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [396628778] [2022-04-06 20:38:24,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [396628778] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:24,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:24,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:38:24,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362379478] [2022-04-06 20:38:24,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:24,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:38:24,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:24,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:38:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:38:24,713 INFO L87 Difference]: Start difference. First operand 536 states and 729 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:25,607 INFO L93 Difference]: Finished difference Result 606 states and 836 transitions. [2022-04-06 20:38:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:38:25,607 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:38:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:25,608 INFO L225 Difference]: With dead ends: 606 [2022-04-06 20:38:25,609 INFO L226 Difference]: Without dead ends: 601 [2022-04-06 20:38:25,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=491, Invalid=1765, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:38:25,609 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:25,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 59 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:38:25,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-04-06 20:38:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 584. [2022-04-06 20:38:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.3696027633851469) internal successors, (793), 579 states have internal predecessors, (793), 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 20:38:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 797 transitions. [2022-04-06 20:38:25,850 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 797 transitions. Word has length 42 [2022-04-06 20:38:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:25,851 INFO L478 AbstractCegarLoop]: Abstraction has 584 states and 797 transitions. [2022-04-06 20:38:25,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 797 transitions. [2022-04-06 20:38:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:38:25,851 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:25,851 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:25,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:26,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:26,052 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1266472641, now seen corresponding path program 53 times [2022-04-06 20:38:26,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:26,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7344136] [2022-04-06 20:38:26,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:26,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1266472641, now seen corresponding path program 54 times [2022-04-06 20:38:26,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:26,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960227931] [2022-04-06 20:38:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:26,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:26,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:26,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:26,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960227931] [2022-04-06 20:38:26,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960227931] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:26,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626157150] [2022-04-06 20:38:26,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:26,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:26,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:26,468 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:26,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:38:27,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-06 20:38:27,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:27,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:38:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:27,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:28,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626157150] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:28,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:28,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:38:28,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:28,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7344136] [2022-04-06 20:38:28,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7344136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:28,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:28,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:38:28,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879271767] [2022-04-06 20:38:28,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:28,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:38:28,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:38:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=2875, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:38:28,767 INFO L87 Difference]: Start difference. First operand 584 states and 797 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:31,997 INFO L93 Difference]: Finished difference Result 1017 states and 1561 transitions. [2022-04-06 20:38:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:38:31,997 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:38:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:31,998 INFO L225 Difference]: With dead ends: 1017 [2022-04-06 20:38:31,998 INFO L226 Difference]: Without dead ends: 984 [2022-04-06 20:38:31,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1837, Invalid=6353, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:38:31,999 INFO L913 BasicCegarLoop]: 127 mSDtfsCounter, 217 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 6524 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 6681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 6524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:31,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 274 Invalid, 6681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 6524 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:38:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-04-06 20:38:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 607. [2022-04-06 20:38:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 602 states have (on average 1.3737541528239203) internal successors, (827), 602 states have internal predecessors, (827), 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 20:38:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 831 transitions. [2022-04-06 20:38:32,252 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 831 transitions. Word has length 42 [2022-04-06 20:38:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:32,252 INFO L478 AbstractCegarLoop]: Abstraction has 607 states and 831 transitions. [2022-04-06 20:38:32,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 831 transitions. [2022-04-06 20:38:32,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:38:32,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:32,253 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:32,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 20:38:32,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-04-06 20:38:32,454 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:32,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash -7434424, now seen corresponding path program 83 times [2022-04-06 20:38:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:32,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [619691018] [2022-04-06 20:38:32,455 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:32,455 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash -7434424, now seen corresponding path program 84 times [2022-04-06 20:38:32,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:32,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981136845] [2022-04-06 20:38:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:32,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:32,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:38:32,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:32,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981136845] [2022-04-06 20:38:32,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981136845] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:32,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921991278] [2022-04-06 20:38:32,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:32,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:32,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:32,942 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:32,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:38:33,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:38:33,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:33,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:38:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:34,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:37,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921991278] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:37,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:37,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 34, 26] total 75 [2022-04-06 20:38:37,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:37,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [619691018] [2022-04-06 20:38:37,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [619691018] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:37,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:37,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:38:37,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494015491] [2022-04-06 20:38:37,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:37,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:38:37,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:37,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:38:37,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=760, Invalid=4790, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:38:37,039 INFO L87 Difference]: Start difference. First operand 607 states and 831 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:41,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:41,250 INFO L93 Difference]: Finished difference Result 628 states and 852 transitions. [2022-04-06 20:38:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:38:41,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:38:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:41,251 INFO L225 Difference]: With dead ends: 628 [2022-04-06 20:38:41,251 INFO L226 Difference]: Without dead ends: 623 [2022-04-06 20:38:41,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=977, Invalid=7953, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:38:41,252 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:41,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 108 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:38:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-04-06 20:38:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 607. [2022-04-06 20:38:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 602 states have (on average 1.3737541528239203) internal successors, (827), 602 states have internal predecessors, (827), 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 20:38:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 831 transitions. [2022-04-06 20:38:41,514 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 831 transitions. Word has length 43 [2022-04-06 20:38:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:41,515 INFO L478 AbstractCegarLoop]: Abstraction has 607 states and 831 transitions. [2022-04-06 20:38:41,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 831 transitions. [2022-04-06 20:38:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:38:41,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:41,516 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:41,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:41,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:41,716 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:41,716 INFO L85 PathProgramCache]: Analyzing trace with hash 878062920, now seen corresponding path program 85 times [2022-04-06 20:38:41,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:41,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1878344286] [2022-04-06 20:38:41,717 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:41,717 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash 878062920, now seen corresponding path program 86 times [2022-04-06 20:38:41,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:41,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157413669] [2022-04-06 20:38:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:41,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:41,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 20:38:41,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:41,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157413669] [2022-04-06 20:38:41,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157413669] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:41,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257989405] [2022-04-06 20:38:41,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:41,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:41,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:41,910 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:41,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:38:41,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:41,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:38:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 20:38:42,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 20:38:42,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257989405] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:42,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:42,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:38:42,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:42,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1878344286] [2022-04-06 20:38:42,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1878344286] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:42,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:42,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:38:42,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907838309] [2022-04-06 20:38:42,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:42,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:38:42,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:38:42,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:38:42,371 INFO L87 Difference]: Start difference. First operand 607 states and 831 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:38:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:43,664 INFO L93 Difference]: Finished difference Result 729 states and 962 transitions. [2022-04-06 20:38:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:38:43,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 43 [2022-04-06 20:38:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:43,665 INFO L225 Difference]: With dead ends: 729 [2022-04-06 20:38:43,665 INFO L226 Difference]: Without dead ends: 708 [2022-04-06 20:38:43,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:38:43,666 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:43,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 117 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-04-06 20:38:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 607. [2022-04-06 20:38:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 602 states have (on average 1.372093023255814) internal successors, (826), 602 states have internal predecessors, (826), 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 20:38:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 830 transitions. [2022-04-06 20:38:43,932 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 830 transitions. Word has length 43 [2022-04-06 20:38:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:43,932 INFO L478 AbstractCegarLoop]: Abstraction has 607 states and 830 transitions. [2022-04-06 20:38:43,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:38:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 830 transitions. [2022-04-06 20:38:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:38:43,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:43,933 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:43,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 20:38:44,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:44,133 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1640467482, now seen corresponding path program 35 times [2022-04-06 20:38:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:44,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1788460307] [2022-04-06 20:38:44,134 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:44,134 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1640467482, now seen corresponding path program 36 times [2022-04-06 20:38:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:44,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425719529] [2022-04-06 20:38:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:44,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:44,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:38:44,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:44,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425719529] [2022-04-06 20:38:44,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425719529] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:44,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521062762] [2022-04-06 20:38:44,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:44,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:44,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:44,360 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:44,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:38:44,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:38:44,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:44,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:38:44,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:38:44,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:38:45,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521062762] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:45,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:45,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 53 [2022-04-06 20:38:45,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:45,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1788460307] [2022-04-06 20:38:45,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1788460307] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:45,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:45,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:38:45,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909920634] [2022-04-06 20:38:45,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:45,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:38:45,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:38:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2333, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:38:45,366 INFO L87 Difference]: Start difference. First operand 607 states and 830 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:38:47,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:47,686 INFO L93 Difference]: Finished difference Result 736 states and 967 transitions. [2022-04-06 20:38:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:38:47,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 43 [2022-04-06 20:38:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:47,688 INFO L225 Difference]: With dead ends: 736 [2022-04-06 20:38:47,688 INFO L226 Difference]: Without dead ends: 674 [2022-04-06 20:38:47,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4320 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2258, Invalid=15034, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 20:38:47,689 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:47,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 126 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:38:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-04-06 20:38:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 606. [2022-04-06 20:38:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 601 states have (on average 1.3643926788685523) internal successors, (820), 601 states have internal predecessors, (820), 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 20:38:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 824 transitions. [2022-04-06 20:38:47,953 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 824 transitions. Word has length 43 [2022-04-06 20:38:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:47,953 INFO L478 AbstractCegarLoop]: Abstraction has 606 states and 824 transitions. [2022-04-06 20:38:47,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:38:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 824 transitions. [2022-04-06 20:38:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:38:47,954 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:47,954 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:47,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:48,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:48,154 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:48,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1870434904, now seen corresponding path program 87 times [2022-04-06 20:38:48,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:48,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2112799654] [2022-04-06 20:38:48,155 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:48,155 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:48,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1870434904, now seen corresponding path program 88 times [2022-04-06 20:38:48,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:48,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694635312] [2022-04-06 20:38:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:48,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:48,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-04-06 20:38:48,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:48,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694635312] [2022-04-06 20:38:48,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694635312] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:48,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99722720] [2022-04-06 20:38:48,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:48,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:48,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:48,322 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:48,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:38:48,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:48,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:38:48,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-04-06 20:38:48,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-04-06 20:38:48,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99722720] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:48,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:48,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:38:48,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:48,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2112799654] [2022-04-06 20:38:48,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2112799654] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:48,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:48,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:38:48,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787808813] [2022-04-06 20:38:48,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:48,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:38:48,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:48,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:38:48,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:38:48,796 INFO L87 Difference]: Start difference. First operand 606 states and 824 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:38:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:50,162 INFO L93 Difference]: Finished difference Result 752 states and 980 transitions. [2022-04-06 20:38:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:38:50,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 43 [2022-04-06 20:38:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:50,163 INFO L225 Difference]: With dead ends: 752 [2022-04-06 20:38:50,163 INFO L226 Difference]: Without dead ends: 731 [2022-04-06 20:38:50,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=708, Invalid=2952, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:38:50,164 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 52 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:50,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 123 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-04-06 20:38:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 606. [2022-04-06 20:38:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 601 states have (on average 1.362728785357737) internal successors, (819), 601 states have internal predecessors, (819), 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 20:38:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 823 transitions. [2022-04-06 20:38:50,429 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 823 transitions. Word has length 43 [2022-04-06 20:38:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:50,429 INFO L478 AbstractCegarLoop]: Abstraction has 606 states and 823 transitions. [2022-04-06 20:38:50,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:38:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 823 transitions. [2022-04-06 20:38:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:38:50,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:50,430 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:50,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:50,646 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-04-06 20:38:50,646 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:50,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1838331064, now seen corresponding path program 89 times [2022-04-06 20:38:50,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:50,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1158463263] [2022-04-06 20:38:50,647 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:50,647 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:50,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1838331064, now seen corresponding path program 90 times [2022-04-06 20:38:50,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:50,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907302150] [2022-04-06 20:38:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:50,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:50,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:38:50,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:50,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907302150] [2022-04-06 20:38:50,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907302150] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:50,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918574317] [2022-04-06 20:38:50,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:50,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:50,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:50,823 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:50,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:38:51,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:38:51,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:38:51,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:38:51,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:38:51,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918574317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:51,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:51,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:38:51,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:51,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1158463263] [2022-04-06 20:38:51,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1158463263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:51,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:51,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:38:51,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968906910] [2022-04-06 20:38:51,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:51,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:38:51,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:51,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:38:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:38:51,538 INFO L87 Difference]: Start difference. First operand 606 states and 823 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:38:52,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:52,944 INFO L93 Difference]: Finished difference Result 777 states and 1005 transitions. [2022-04-06 20:38:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:38:52,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 43 [2022-04-06 20:38:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:52,945 INFO L225 Difference]: With dead ends: 777 [2022-04-06 20:38:52,945 INFO L226 Difference]: Without dead ends: 756 [2022-04-06 20:38:52,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=653, Invalid=2653, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:38:52,946 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 60 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:52,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 123 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-04-06 20:38:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 606. [2022-04-06 20:38:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 601 states have (on average 1.3610648918469217) internal successors, (818), 601 states have internal predecessors, (818), 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 20:38:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 822 transitions. [2022-04-06 20:38:53,224 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 822 transitions. Word has length 43 [2022-04-06 20:38:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:53,224 INFO L478 AbstractCegarLoop]: Abstraction has 606 states and 822 transitions. [2022-04-06 20:38:53,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:38:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 822 transitions. [2022-04-06 20:38:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:38:53,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:53,225 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:53,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-06 20:38:53,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:53,425 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2096516008, now seen corresponding path program 91 times [2022-04-06 20:38:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:53,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1593283753] [2022-04-06 20:38:53,426 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:53,426 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2096516008, now seen corresponding path program 92 times [2022-04-06 20:38:53,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:53,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387516367] [2022-04-06 20:38:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:53,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:53,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:38:53,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:53,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387516367] [2022-04-06 20:38:53,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387516367] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:53,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949934847] [2022-04-06 20:38:53,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:53,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:53,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:53,600 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:53,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:38:53,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:53,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:38:53,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:38:53,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:38:54,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949934847] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:54,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:54,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:38:54,075 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:54,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1593283753] [2022-04-06 20:38:54,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1593283753] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:54,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:54,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:38:54,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054121941] [2022-04-06 20:38:54,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:54,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:38:54,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:54,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:38:54,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:38:54,076 INFO L87 Difference]: Start difference. First operand 606 states and 822 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:38:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:55,607 INFO L93 Difference]: Finished difference Result 803 states and 1031 transitions. [2022-04-06 20:38:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:38:55,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 43 [2022-04-06 20:38:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:55,609 INFO L225 Difference]: With dead ends: 803 [2022-04-06 20:38:55,609 INFO L226 Difference]: Without dead ends: 782 [2022-04-06 20:38:55,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=606, Invalid=2364, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:38:55,610 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 69 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:55,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 134 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-04-06 20:38:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 606. [2022-04-06 20:38:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 601 states have (on average 1.3594009983361064) internal successors, (817), 601 states have internal predecessors, (817), 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 20:38:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 821 transitions. [2022-04-06 20:38:55,887 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 821 transitions. Word has length 43 [2022-04-06 20:38:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:55,887 INFO L478 AbstractCegarLoop]: Abstraction has 606 states and 821 transitions. [2022-04-06 20:38:55,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:38:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 821 transitions. [2022-04-06 20:38:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:38:55,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:55,888 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:55,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 20:38:56,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:56,089 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash 666102088, now seen corresponding path program 93 times [2022-04-06 20:38:56,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:56,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1320537141] [2022-04-06 20:38:56,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:56,090 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash 666102088, now seen corresponding path program 94 times [2022-04-06 20:38:56,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:56,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965307586] [2022-04-06 20:38:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:56,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:56,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:38:56,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965307586] [2022-04-06 20:38:56,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965307586] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481559537] [2022-04-06 20:38:56,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:56,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:56,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:56,265 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:56,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:38:56,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:56,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:38:56,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:38:56,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:38:56,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481559537] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:56,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:56,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:38:56,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:56,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1320537141] [2022-04-06 20:38:56,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1320537141] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:56,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:56,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:38:56,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675626989] [2022-04-06 20:38:56,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:56,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:38:56,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:38:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:38:56,752 INFO L87 Difference]: Start difference. First operand 606 states and 821 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:38:58,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:58,308 INFO L93 Difference]: Finished difference Result 830 states and 1058 transitions. [2022-04-06 20:38:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:38:58,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 43 [2022-04-06 20:38:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:58,310 INFO L225 Difference]: With dead ends: 830 [2022-04-06 20:38:58,310 INFO L226 Difference]: Without dead ends: 809 [2022-04-06 20:38:58,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=2167, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:38:58,311 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 81 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:58,311 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 135 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-04-06 20:38:58,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 606. [2022-04-06 20:38:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 601 states have (on average 1.357737104825291) internal successors, (816), 601 states have internal predecessors, (816), 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 20:38:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 820 transitions. [2022-04-06 20:38:58,589 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 820 transitions. Word has length 43 [2022-04-06 20:38:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:58,589 INFO L478 AbstractCegarLoop]: Abstraction has 606 states and 820 transitions. [2022-04-06 20:38:58,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 20:38:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 820 transitions. [2022-04-06 20:38:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:38:58,590 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:58,590 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:58,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:58,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:58,791 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:58,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1642651160, now seen corresponding path program 55 times [2022-04-06 20:38:58,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:58,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [852381658] [2022-04-06 20:38:58,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:58,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:58,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1642651160, now seen corresponding path program 56 times [2022-04-06 20:38:58,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:58,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8800435] [2022-04-06 20:38:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:58,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:59,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:59,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:59,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8800435] [2022-04-06 20:38:59,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8800435] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:59,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015124018] [2022-04-06 20:38:59,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:59,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:59,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:59,218 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:59,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:38:59,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:59,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:59,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:38:59,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:59,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:00,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015124018] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:00,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:00,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:39:00,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:00,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [852381658] [2022-04-06 20:39:00,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [852381658] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:00,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:00,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:39:00,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760721232] [2022-04-06 20:39:00,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:00,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:39:00,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:00,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:39:00,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=3064, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:39:00,507 INFO L87 Difference]: Start difference. First operand 606 states and 820 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 20:39:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:04,118 INFO L93 Difference]: Finished difference Result 1051 states and 1607 transitions. [2022-04-06 20:39:04,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:39:04,119 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 20:39:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:04,120 INFO L225 Difference]: With dead ends: 1051 [2022-04-06 20:39:04,120 INFO L226 Difference]: Without dead ends: 1018 [2022-04-06 20:39:04,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1960, Invalid=6782, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:39:04,121 INFO L913 BasicCegarLoop]: 132 mSDtfsCounter, 220 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 7019 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 7176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 7019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:04,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 284 Invalid, 7176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 7019 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:39:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-04-06 20:39:04,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 629. [2022-04-06 20:39:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 624 states have (on average 1.3621794871794872) internal successors, (850), 624 states have internal predecessors, (850), 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 20:39:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 854 transitions. [2022-04-06 20:39:04,395 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 854 transitions. Word has length 43 [2022-04-06 20:39:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:04,395 INFO L478 AbstractCegarLoop]: Abstraction has 629 states and 854 transitions. [2022-04-06 20:39:04,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 20:39:04,396 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 854 transitions. [2022-04-06 20:39:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:39:04,396 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:04,396 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:04,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:04,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:04,604 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash -195972048, now seen corresponding path program 95 times [2022-04-06 20:39:04,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:04,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [98129731] [2022-04-06 20:39:04,605 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:04,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash -195972048, now seen corresponding path program 96 times [2022-04-06 20:39:04,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:04,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546245816] [2022-04-06 20:39:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:04,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:39:04,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546245816] [2022-04-06 20:39:04,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546245816] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768670878] [2022-04-06 20:39:04,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:04,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:04,699 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:04,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:39:04,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:39:04,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:04,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:39:04,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:39:04,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:39:04,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768670878] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:04,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:04,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-04-06 20:39:04,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:04,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [98129731] [2022-04-06 20:39:04,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [98129731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:04,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:04,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:39:04,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193364082] [2022-04-06 20:39:04,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:04,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:39:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:39:04,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:39:04,960 INFO L87 Difference]: Start difference. First operand 629 states and 854 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:05,618 INFO L93 Difference]: Finished difference Result 659 states and 885 transitions. [2022-04-06 20:39:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:39:05,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:39:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:05,619 INFO L225 Difference]: With dead ends: 659 [2022-04-06 20:39:05,619 INFO L226 Difference]: Without dead ends: 628 [2022-04-06 20:39:05,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:39:05,620 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 49 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:05,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 79 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:39:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-04-06 20:39:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 621. [2022-04-06 20:39:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 616 states have (on average 1.3652597402597402) internal successors, (841), 616 states have internal predecessors, (841), 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 20:39:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 845 transitions. [2022-04-06 20:39:05,918 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 845 transitions. Word has length 44 [2022-04-06 20:39:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:05,918 INFO L478 AbstractCegarLoop]: Abstraction has 621 states and 845 transitions. [2022-04-06 20:39:05,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 845 transitions. [2022-04-06 20:39:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:39:05,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:05,919 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:05,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:06,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-04-06 20:39:06,120 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:06,120 INFO L85 PathProgramCache]: Analyzing trace with hash 419283361, now seen corresponding path program 57 times [2022-04-06 20:39:06,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:06,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1227459257] [2022-04-06 20:39:06,121 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:06,121 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash 419283361, now seen corresponding path program 58 times [2022-04-06 20:39:06,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:06,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615833356] [2022-04-06 20:39:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:06,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:06,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:06,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:06,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615833356] [2022-04-06 20:39:06,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615833356] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440446170] [2022-04-06 20:39:06,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:06,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:06,589 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:06,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:39:06,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:06,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:06,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:39:06,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:06,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:07,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440446170] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:07,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:07,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:39:07,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:07,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1227459257] [2022-04-06 20:39:07,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1227459257] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:07,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:07,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:39:07,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114317777] [2022-04-06 20:39:07,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:07,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:39:07,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:07,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:39:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=3259, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:39:07,939 INFO L87 Difference]: Start difference. First operand 621 states and 845 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:11,738 INFO L93 Difference]: Finished difference Result 1080 states and 1657 transitions. [2022-04-06 20:39:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:39:11,738 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:39:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:11,740 INFO L225 Difference]: With dead ends: 1080 [2022-04-06 20:39:11,740 INFO L226 Difference]: Without dead ends: 1046 [2022-04-06 20:39:11,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2087, Invalid=7225, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:39:11,741 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 226 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 7409 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 7574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 7409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:11,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 291 Invalid, 7574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 7409 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:39:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-04-06 20:39:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 644. [2022-04-06 20:39:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 639 states have (on average 1.3693270735524257) internal successors, (875), 639 states have internal predecessors, (875), 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 20:39:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 879 transitions. [2022-04-06 20:39:12,055 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 879 transitions. Word has length 44 [2022-04-06 20:39:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:12,055 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 879 transitions. [2022-04-06 20:39:12,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 879 transitions. [2022-04-06 20:39:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:39:12,056 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:12,056 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:12,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 20:39:12,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-04-06 20:39:12,256 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash 63675064, now seen corresponding path program 97 times [2022-04-06 20:39:12,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:12,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1532565013] [2022-04-06 20:39:12,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:12,261 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash 63675064, now seen corresponding path program 98 times [2022-04-06 20:39:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:12,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229675607] [2022-04-06 20:39:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:12,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:12,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 20:39:12,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:12,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229675607] [2022-04-06 20:39:12,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229675607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:12,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107076527] [2022-04-06 20:39:12,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:12,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:12,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:12,445 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:12,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:39:12,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:12,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:12,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:39:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 20:39:12,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 20:39:12,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107076527] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:12,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:12,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:39:12,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:12,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1532565013] [2022-04-06 20:39:12,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1532565013] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:12,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:12,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:39:12,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653304191] [2022-04-06 20:39:12,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:12,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:39:12,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:39:12,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:39:12,947 INFO L87 Difference]: Start difference. First operand 644 states and 879 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:14,360 INFO L93 Difference]: Finished difference Result 775 states and 1020 transitions. [2022-04-06 20:39:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:39:14,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have 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 20:39:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:14,361 INFO L225 Difference]: With dead ends: 775 [2022-04-06 20:39:14,361 INFO L226 Difference]: Without dead ends: 753 [2022-04-06 20:39:14,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=759, Invalid=3273, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:39:14,362 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:14,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 106 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-04-06 20:39:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 644. [2022-04-06 20:39:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 639 states have (on average 1.3677621283255086) internal successors, (874), 639 states have internal predecessors, (874), 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 20:39:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 878 transitions. [2022-04-06 20:39:14,665 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 878 transitions. Word has length 45 [2022-04-06 20:39:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:14,665 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 878 transitions. [2022-04-06 20:39:14,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 878 transitions. [2022-04-06 20:39:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:39:14,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:14,666 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:14,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 20:39:14,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:14,867 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:14,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1442224296, now seen corresponding path program 37 times [2022-04-06 20:39:14,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:14,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [862554719] [2022-04-06 20:39:14,868 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:14,868 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:14,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1442224296, now seen corresponding path program 38 times [2022-04-06 20:39:14,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:14,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766326156] [2022-04-06 20:39:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:14,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:15,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:39:15,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:15,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766326156] [2022-04-06 20:39:15,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766326156] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:15,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756623275] [2022-04-06 20:39:15,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:15,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:15,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:15,125 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:15,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:39:15,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:15,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:15,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:39:15,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:39:15,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:39:16,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756623275] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:16,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:16,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 17] total 51 [2022-04-06 20:39:16,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:16,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [862554719] [2022-04-06 20:39:16,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [862554719] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:16,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:16,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:39:16,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376680104] [2022-04-06 20:39:16,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:16,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:39:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:39:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:39:16,079 INFO L87 Difference]: Start difference. First operand 644 states and 878 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:17,338 INFO L93 Difference]: Finished difference Result 721 states and 996 transitions. [2022-04-06 20:39:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:39:17,338 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:39:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:17,339 INFO L225 Difference]: With dead ends: 721 [2022-04-06 20:39:17,339 INFO L226 Difference]: Without dead ends: 716 [2022-04-06 20:39:17,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=717, Invalid=4253, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:39:17,340 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 191 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:17,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 57 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-04-06 20:39:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 697. [2022-04-06 20:39:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 692 states have (on average 1.3713872832369942) internal successors, (949), 692 states have internal predecessors, (949), 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 20:39:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 953 transitions. [2022-04-06 20:39:17,679 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 953 transitions. Word has length 45 [2022-04-06 20:39:17,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:17,679 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 953 transitions. [2022-04-06 20:39:17,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 953 transitions. [2022-04-06 20:39:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:39:17,680 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:17,680 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:17,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:17,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:17,880 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:17,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1874479014, now seen corresponding path program 99 times [2022-04-06 20:39:17,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:17,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [830241088] [2022-04-06 20:39:17,881 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:17,881 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1874479014, now seen corresponding path program 100 times [2022-04-06 20:39:17,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:17,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745020726] [2022-04-06 20:39:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:17,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:18,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 20:39:18,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:18,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745020726] [2022-04-06 20:39:18,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745020726] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:18,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273925823] [2022-04-06 20:39:18,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:18,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:18,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:18,063 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:18,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:39:18,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:18,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:18,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:39:18,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 20:39:18,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 20:39:18,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273925823] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:18,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:18,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:39:18,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:18,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [830241088] [2022-04-06 20:39:18,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [830241088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:18,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:18,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:39:18,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558388019] [2022-04-06 20:39:18,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:18,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:39:18,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:18,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:39:18,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:39:18,573 INFO L87 Difference]: Start difference. First operand 697 states and 953 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:20,262 INFO L93 Difference]: Finished difference Result 875 states and 1142 transitions. [2022-04-06 20:39:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:39:20,263 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have 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 20:39:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:20,264 INFO L225 Difference]: With dead ends: 875 [2022-04-06 20:39:20,264 INFO L226 Difference]: Without dead ends: 853 [2022-04-06 20:39:20,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=776, Invalid=3256, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:39:20,265 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 52 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:20,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 117 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-04-06 20:39:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 697. [2022-04-06 20:39:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 692 states have (on average 1.369942196531792) internal successors, (948), 692 states have internal predecessors, (948), 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 20:39:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 952 transitions. [2022-04-06 20:39:20,609 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 952 transitions. Word has length 45 [2022-04-06 20:39:20,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:20,609 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 952 transitions. [2022-04-06 20:39:20,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:20,609 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 952 transitions. [2022-04-06 20:39:20,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:39:20,610 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:20,610 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:20,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-04-06 20:39:20,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-06 20:39:20,819 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1240155384, now seen corresponding path program 101 times [2022-04-06 20:39:20,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:20,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674426867] [2022-04-06 20:39:20,820 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:20,820 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1240155384, now seen corresponding path program 102 times [2022-04-06 20:39:20,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:20,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769128318] [2022-04-06 20:39:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:20,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:21,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:39:21,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769128318] [2022-04-06 20:39:21,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769128318] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869098284] [2022-04-06 20:39:21,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:21,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:21,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:21,012 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:21,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:39:21,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:39:21,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:21,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:39:21,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:39:21,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:39:22,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869098284] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:22,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:22,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:39:22,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674426867] [2022-04-06 20:39:22,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674426867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:22,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:22,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:39:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073160979] [2022-04-06 20:39:22,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:22,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:39:22,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:22,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:39:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:39:22,043 INFO L87 Difference]: Start difference. First operand 697 states and 952 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:23,772 INFO L93 Difference]: Finished difference Result 902 states and 1169 transitions. [2022-04-06 20:39:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:39:23,772 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have 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 20:39:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:23,773 INFO L225 Difference]: With dead ends: 902 [2022-04-06 20:39:23,773 INFO L226 Difference]: Without dead ends: 880 [2022-04-06 20:39:23,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=721, Invalid=2939, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:39:23,774 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 60 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:23,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 127 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-04-06 20:39:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 697. [2022-04-06 20:39:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 692 states have (on average 1.3684971098265897) internal successors, (947), 692 states have internal predecessors, (947), 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 20:39:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 951 transitions. [2022-04-06 20:39:24,115 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 951 transitions. Word has length 45 [2022-04-06 20:39:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:24,115 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 951 transitions. [2022-04-06 20:39:24,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 951 transitions. [2022-04-06 20:39:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:39:24,116 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:24,116 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:24,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:24,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:24,317 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash -304327322, now seen corresponding path program 103 times [2022-04-06 20:39:24,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:24,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1078110031] [2022-04-06 20:39:24,318 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:24,318 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:24,318 INFO L85 PathProgramCache]: Analyzing trace with hash -304327322, now seen corresponding path program 104 times [2022-04-06 20:39:24,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:24,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062179522] [2022-04-06 20:39:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:24,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:24,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 20:39:24,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:24,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062179522] [2022-04-06 20:39:24,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062179522] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:24,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264965477] [2022-04-06 20:39:24,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:24,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:24,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:24,527 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:24,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:39:24,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:24,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:24,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:39:24,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 20:39:24,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 20:39:25,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264965477] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:25,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:25,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:39:25,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:25,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1078110031] [2022-04-06 20:39:25,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1078110031] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:25,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:25,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:39:25,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026611457] [2022-04-06 20:39:25,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:25,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:39:25,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:39:25,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1125, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:39:25,056 INFO L87 Difference]: Start difference. First operand 697 states and 951 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:26,897 INFO L93 Difference]: Finished difference Result 930 states and 1197 transitions. [2022-04-06 20:39:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:39:26,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have 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 20:39:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:26,899 INFO L225 Difference]: With dead ends: 930 [2022-04-06 20:39:26,899 INFO L226 Difference]: Without dead ends: 908 [2022-04-06 20:39:26,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=2632, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:39:26,899 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 69 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:26,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 143 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-04-06 20:39:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 697. [2022-04-06 20:39:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 692 states have (on average 1.3670520231213872) internal successors, (946), 692 states have internal predecessors, (946), 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 20:39:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 950 transitions. [2022-04-06 20:39:27,240 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 950 transitions. Word has length 45 [2022-04-06 20:39:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:27,241 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 950 transitions. [2022-04-06 20:39:27,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 950 transitions. [2022-04-06 20:39:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:39:27,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:27,241 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:27,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-06 20:39:27,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 20:39:27,442 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash 477134648, now seen corresponding path program 105 times [2022-04-06 20:39:27,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:27,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165961320] [2022-04-06 20:39:27,443 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:27,443 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:27,443 INFO L85 PathProgramCache]: Analyzing trace with hash 477134648, now seen corresponding path program 106 times [2022-04-06 20:39:27,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:27,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096436402] [2022-04-06 20:39:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:27,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:39:27,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:27,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096436402] [2022-04-06 20:39:27,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096436402] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:27,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969518895] [2022-04-06 20:39:27,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:27,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:27,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:27,630 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:27,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:39:27,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:27,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:27,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:39:27,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:39:27,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:39:28,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969518895] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:28,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:28,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:39:28,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:28,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165961320] [2022-04-06 20:39:28,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165961320] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:28,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:28,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:39:28,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7828111] [2022-04-06 20:39:28,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:28,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:39:28,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:28,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:39:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:39:28,150 INFO L87 Difference]: Start difference. First operand 697 states and 950 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:30,034 INFO L93 Difference]: Finished difference Result 959 states and 1226 transitions. [2022-04-06 20:39:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:39:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have 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 20:39:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:30,036 INFO L225 Difference]: With dead ends: 959 [2022-04-06 20:39:30,036 INFO L226 Difference]: Without dead ends: 937 [2022-04-06 20:39:30,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=658, Invalid=2422, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:39:30,036 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 83 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:30,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 147 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1819 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-04-06 20:39:30,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 697. [2022-04-06 20:39:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 692 states have (on average 1.365606936416185) internal successors, (945), 692 states have internal predecessors, (945), 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 20:39:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 949 transitions. [2022-04-06 20:39:30,378 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 949 transitions. Word has length 45 [2022-04-06 20:39:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:30,378 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 949 transitions. [2022-04-06 20:39:30,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 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 20:39:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 949 transitions. [2022-04-06 20:39:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:39:30,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:30,379 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:30,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-04-06 20:39:30,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 20:39:30,579 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1149587256, now seen corresponding path program 59 times [2022-04-06 20:39:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [70922850] [2022-04-06 20:39:30,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:30,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:30,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1149587256, now seen corresponding path program 60 times [2022-04-06 20:39:30,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:30,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450535981] [2022-04-06 20:39:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:31,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:31,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450535981] [2022-04-06 20:39:31,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450535981] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960760936] [2022-04-06 20:39:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:31,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:31,063 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:31,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:39:33,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 20:39:33,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:33,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:39:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:33,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:34,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960760936] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:34,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:34,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:39:34,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:34,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [70922850] [2022-04-06 20:39:34,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [70922850] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:34,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:34,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:39:34,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897598538] [2022-04-06 20:39:34,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:34,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:39:34,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:34,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:39:34,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3460, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:39:34,768 INFO L87 Difference]: Start difference. First operand 697 states and 949 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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 20:39:38,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:38,991 INFO L93 Difference]: Finished difference Result 1212 states and 1861 transitions. [2022-04-06 20:39:38,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:39:38,992 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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 20:39:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:38,993 INFO L225 Difference]: With dead ends: 1212 [2022-04-06 20:39:38,993 INFO L226 Difference]: Without dead ends: 1176 [2022-04-06 20:39:38,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2218, Invalid=7682, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:39:38,994 INFO L913 BasicCegarLoop]: 139 mSDtfsCounter, 230 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 7936 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 8102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 7936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:38,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 301 Invalid, 8102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 7936 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:39:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-04-06 20:39:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 722. [2022-04-06 20:39:39,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 717 states have (on average 1.3695955369595536) internal successors, (982), 717 states have internal predecessors, (982), 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 20:39:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 986 transitions. [2022-04-06 20:39:39,351 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 986 transitions. Word has length 45 [2022-04-06 20:39:39,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:39,351 INFO L478 AbstractCegarLoop]: Abstraction has 722 states and 986 transitions. [2022-04-06 20:39:39,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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 20:39:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 986 transitions. [2022-04-06 20:39:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:39:39,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:39,352 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:39,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-06 20:39:39,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-04-06 20:39:39,552 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1565708992, now seen corresponding path program 39 times [2022-04-06 20:39:39,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:39,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497014299] [2022-04-06 20:39:39,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:39,554 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1565708992, now seen corresponding path program 40 times [2022-04-06 20:39:39,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:39,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343753416] [2022-04-06 20:39:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:39,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:39:39,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:39,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343753416] [2022-04-06 20:39:39,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343753416] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:39,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635134406] [2022-04-06 20:39:39,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:39,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:39,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:39,816 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:39,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 20:39:39,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:39,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:39:39,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:39:40,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:39:40,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635134406] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:40,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:40,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 58 [2022-04-06 20:39:40,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:40,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497014299] [2022-04-06 20:39:40,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497014299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:40,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:40,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:39:40,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025725206] [2022-04-06 20:39:40,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:40,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:39:40,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:40,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:39:40,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=2808, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:39:40,872 INFO L87 Difference]: Start difference. First operand 722 states and 986 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:39:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:43,672 INFO L93 Difference]: Finished difference Result 875 states and 1148 transitions. [2022-04-06 20:39:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 20:39:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:39:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:43,673 INFO L225 Difference]: With dead ends: 875 [2022-04-06 20:39:43,674 INFO L226 Difference]: Without dead ends: 796 [2022-04-06 20:39:43,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5447 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2736, Invalid=18726, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 20:39:43,675 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:43,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 138 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:39:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-04-06 20:39:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 721. [2022-04-06 20:39:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 716 states have (on average 1.361731843575419) internal successors, (975), 716 states have internal predecessors, (975), 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 20:39:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 979 transitions. [2022-04-06 20:39:44,030 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 979 transitions. Word has length 46 [2022-04-06 20:39:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:44,030 INFO L478 AbstractCegarLoop]: Abstraction has 721 states and 979 transitions. [2022-04-06 20:39:44,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:39:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 979 transitions. [2022-04-06 20:39:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:39:44,031 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:44,031 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:44,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-04-06 20:39:44,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:44,231 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:44,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1980795775, now seen corresponding path program 61 times [2022-04-06 20:39:44,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:44,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2064588037] [2022-04-06 20:39:44,232 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:44,233 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:44,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1980795775, now seen corresponding path program 62 times [2022-04-06 20:39:44,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:44,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396099559] [2022-04-06 20:39:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:44,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:44,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:44,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:44,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396099559] [2022-04-06 20:39:44,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396099559] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:44,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23446489] [2022-04-06 20:39:44,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:44,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:44,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:44,736 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:44,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 20:39:44,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:44,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:44,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:39:44,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:44,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:46,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23446489] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:46,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:46,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:39:46,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2064588037] [2022-04-06 20:39:46,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2064588037] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:46,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:46,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:39:46,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010362456] [2022-04-06 20:39:46,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:46,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:39:46,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:46,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:39:46,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1163, Invalid=3667, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:39:46,233 INFO L87 Difference]: Start difference. First operand 721 states and 979 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:50,698 INFO L93 Difference]: Finished difference Result 1249 states and 1916 transitions. [2022-04-06 20:39:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:39:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:39:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:50,700 INFO L225 Difference]: With dead ends: 1249 [2022-04-06 20:39:50,700 INFO L226 Difference]: Without dead ends: 1213 [2022-04-06 20:39:50,700 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2353, Invalid=8153, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:39:50,700 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 244 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 8479 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 8656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 8479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:50,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 311 Invalid, 8656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 8479 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:39:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-04-06 20:39:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 746. [2022-04-06 20:39:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 741 states have (on average 1.3657219973009447) internal successors, (1012), 741 states have internal predecessors, (1012), 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 20:39:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1016 transitions. [2022-04-06 20:39:51,066 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1016 transitions. Word has length 46 [2022-04-06 20:39:51,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:51,066 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 1016 transitions. [2022-04-06 20:39:51,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1016 transitions. [2022-04-06 20:39:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:39:51,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:51,067 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:51,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 20:39:51,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:51,268 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:51,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1917615704, now seen corresponding path program 107 times [2022-04-06 20:39:51,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:51,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [833976049] [2022-04-06 20:39:51,271 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:51,271 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1917615704, now seen corresponding path program 108 times [2022-04-06 20:39:51,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:51,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762589560] [2022-04-06 20:39:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:51,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:52,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:39:52,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:52,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762589560] [2022-04-06 20:39:52,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762589560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:52,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617424821] [2022-04-06 20:39:52,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:52,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:52,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:52,119 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:52,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 20:39:52,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:39:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:52,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 20:39:52,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:54,200 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 20:39:54,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:59,008 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 20:39:59,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617424821] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:59,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:59,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 38, 29] total 83 [2022-04-06 20:39:59,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:59,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [833976049] [2022-04-06 20:39:59,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [833976049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:59,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:59,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:39:59,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861876162] [2022-04-06 20:39:59,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:59,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:39:59,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:59,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:39:59,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=5876, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:39:59,010 INFO L87 Difference]: Start difference. First operand 746 states and 1016 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 23 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 20:40:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:04,528 INFO L93 Difference]: Finished difference Result 769 states and 1039 transitions. [2022-04-06 20:40:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:40:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 23 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:40:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:04,530 INFO L225 Difference]: With dead ends: 769 [2022-04-06 20:40:04,530 INFO L226 Difference]: Without dead ends: 764 [2022-04-06 20:40:04,530 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2754 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1179, Invalid=9741, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:40:04,531 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:04,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 113 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:40:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-04-06 20:40:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 746. [2022-04-06 20:40:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 741 states have (on average 1.3657219973009447) internal successors, (1012), 741 states have internal predecessors, (1012), 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 20:40:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1016 transitions. [2022-04-06 20:40:04,919 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1016 transitions. Word has length 47 [2022-04-06 20:40:04,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:04,919 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 1016 transitions. [2022-04-06 20:40:04,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 23 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 20:40:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1016 transitions. [2022-04-06 20:40:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:04,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:04,920 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:04,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:05,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-06 20:40:05,120 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1599525256, now seen corresponding path program 109 times [2022-04-06 20:40:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:05,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [6895629] [2022-04-06 20:40:05,121 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:05,121 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:05,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1599525256, now seen corresponding path program 110 times [2022-04-06 20:40:05,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:05,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191336874] [2022-04-06 20:40:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:05,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:40:05,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:05,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191336874] [2022-04-06 20:40:05,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191336874] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:05,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704696639] [2022-04-06 20:40:05,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:05,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:05,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:05,320 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:05,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 20:40:05,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:05,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:05,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:40:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:40:05,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:40:05,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704696639] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:05,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:05,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:40:05,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:05,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [6895629] [2022-04-06 20:40:05,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [6895629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:05,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:05,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:40:05,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149421835] [2022-04-06 20:40:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:05,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:40:05,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:40:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:40:05,884 INFO L87 Difference]: Start difference. First operand 746 states and 1016 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:40:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:07,723 INFO L93 Difference]: Finished difference Result 907 states and 1188 transitions. [2022-04-06 20:40:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:40:07,724 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 47 [2022-04-06 20:40:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:07,725 INFO L225 Difference]: With dead ends: 907 [2022-04-06 20:40:07,725 INFO L226 Difference]: Without dead ends: 884 [2022-04-06 20:40:07,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=909, Invalid=3921, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:40:07,725 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:07,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 110 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:40:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-04-06 20:40:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 746. [2022-04-06 20:40:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 741 states have (on average 1.3643724696356276) internal successors, (1011), 741 states have internal predecessors, (1011), 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 20:40:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1015 transitions. [2022-04-06 20:40:08,106 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1015 transitions. Word has length 47 [2022-04-06 20:40:08,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:08,106 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 1015 transitions. [2022-04-06 20:40:08,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:40:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1015 transitions. [2022-04-06 20:40:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:08,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:08,107 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:08,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-04-06 20:40:08,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:08,308 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:08,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1283050920, now seen corresponding path program 111 times [2022-04-06 20:40:08,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:08,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1009100418] [2022-04-06 20:40:08,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:08,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:08,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1283050920, now seen corresponding path program 112 times [2022-04-06 20:40:08,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:08,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962013624] [2022-04-06 20:40:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:08,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:08,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:40:08,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:08,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962013624] [2022-04-06 20:40:08,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962013624] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:08,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804057117] [2022-04-06 20:40:08,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:08,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:08,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:08,506 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:08,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 20:40:08,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:08,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:08,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:40:08,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:40:08,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:40:09,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804057117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:09,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:09,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:40:09,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:09,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1009100418] [2022-04-06 20:40:09,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1009100418] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:09,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:09,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:40:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108837193] [2022-04-06 20:40:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:09,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:40:09,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:40:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:40:09,052 INFO L87 Difference]: Start difference. First operand 746 states and 1015 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:40:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:10,937 INFO L93 Difference]: Finished difference Result 934 states and 1215 transitions. [2022-04-06 20:40:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:40:10,938 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 47 [2022-04-06 20:40:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:10,939 INFO L225 Difference]: With dead ends: 934 [2022-04-06 20:40:10,939 INFO L226 Difference]: Without dead ends: 911 [2022-04-06 20:40:10,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=872, Invalid=3684, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:40:10,940 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 61 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:10,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 119 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:40:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-04-06 20:40:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 746. [2022-04-06 20:40:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 741 states have (on average 1.3630229419703104) internal successors, (1010), 741 states have internal predecessors, (1010), 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 20:40:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1014 transitions. [2022-04-06 20:40:11,330 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1014 transitions. Word has length 47 [2022-04-06 20:40:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:11,331 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 1014 transitions. [2022-04-06 20:40:11,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:40:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1014 transitions. [2022-04-06 20:40:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:11,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:11,331 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:11,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:11,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:11,532 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:11,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1098942584, now seen corresponding path program 113 times [2022-04-06 20:40:11,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:11,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [12947106] [2022-04-06 20:40:11,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:11,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:11,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1098942584, now seen corresponding path program 114 times [2022-04-06 20:40:11,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:11,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659618665] [2022-04-06 20:40:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:11,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:11,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:40:11,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:11,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659618665] [2022-04-06 20:40:11,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659618665] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:11,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125740403] [2022-04-06 20:40:11,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:11,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:11,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:11,732 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:11,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 20:40:12,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:40:12,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:12,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:40:12,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:40:12,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:40:12,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125740403] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:12,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:12,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:40:12,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:12,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [12947106] [2022-04-06 20:40:12,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [12947106] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:12,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:12,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:40:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823873274] [2022-04-06 20:40:12,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:12,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:40:12,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:40:12,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:40:12,701 INFO L87 Difference]: Start difference. First operand 746 states and 1014 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:40:14,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:14,634 INFO L93 Difference]: Finished difference Result 962 states and 1243 transitions. [2022-04-06 20:40:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:40:14,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 47 [2022-04-06 20:40:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:14,635 INFO L225 Difference]: With dead ends: 962 [2022-04-06 20:40:14,635 INFO L226 Difference]: Without dead ends: 939 [2022-04-06 20:40:14,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=793, Invalid=3239, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:40:14,636 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 69 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:14,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 130 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:14,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-04-06 20:40:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 746. [2022-04-06 20:40:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 741 states have (on average 1.3616734143049933) internal successors, (1009), 741 states have internal predecessors, (1009), 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 20:40:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1013 transitions. [2022-04-06 20:40:15,020 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1013 transitions. Word has length 47 [2022-04-06 20:40:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:15,021 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 1013 transitions. [2022-04-06 20:40:15,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:40:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1013 transitions. [2022-04-06 20:40:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:15,021 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:15,021 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:15,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:15,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:15,222 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash 431017048, now seen corresponding path program 115 times [2022-04-06 20:40:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:15,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1614450272] [2022-04-06 20:40:15,223 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:15,223 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:15,223 INFO L85 PathProgramCache]: Analyzing trace with hash 431017048, now seen corresponding path program 116 times [2022-04-06 20:40:15,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:15,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989273918] [2022-04-06 20:40:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:15,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:40:15,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:15,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989273918] [2022-04-06 20:40:15,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989273918] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:15,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303492013] [2022-04-06 20:40:15,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:15,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:15,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:15,428 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:15,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 20:40:15,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:15,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:15,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:40:15,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:40:15,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:40:15,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303492013] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:15,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:15,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:40:15,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1614450272] [2022-04-06 20:40:15,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1614450272] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:15,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:15,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:40:15,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783760880] [2022-04-06 20:40:15,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:15,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:40:15,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:15,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:40:15,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:40:15,993 INFO L87 Difference]: Start difference. First operand 746 states and 1013 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:40:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:18,066 INFO L93 Difference]: Finished difference Result 991 states and 1272 transitions. [2022-04-06 20:40:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:40:18,067 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 47 [2022-04-06 20:40:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:18,068 INFO L225 Difference]: With dead ends: 991 [2022-04-06 20:40:18,068 INFO L226 Difference]: Without dead ends: 968 [2022-04-06 20:40:18,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=746, Invalid=2914, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:40:18,069 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 78 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:18,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 151 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-04-06 20:40:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 746. [2022-04-06 20:40:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 741 states have (on average 1.360323886639676) internal successors, (1008), 741 states have internal predecessors, (1008), 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 20:40:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1012 transitions. [2022-04-06 20:40:18,458 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1012 transitions. Word has length 47 [2022-04-06 20:40:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:18,458 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 1012 transitions. [2022-04-06 20:40:18,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:40:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1012 transitions. [2022-04-06 20:40:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:18,459 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:18,459 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:18,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:18,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-06 20:40:18,660 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash -73818744, now seen corresponding path program 117 times [2022-04-06 20:40:18,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:18,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [643965697] [2022-04-06 20:40:18,661 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:18,661 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash -73818744, now seen corresponding path program 118 times [2022-04-06 20:40:18,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:18,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563970163] [2022-04-06 20:40:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:18,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:18,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:40:18,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:18,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563970163] [2022-04-06 20:40:18,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563970163] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:18,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864212287] [2022-04-06 20:40:18,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:18,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:18,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:18,859 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:18,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 20:40:18,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:18,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:18,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:40:18,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:40:18,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:40:19,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864212287] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:19,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:19,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:40:19,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:19,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [643965697] [2022-04-06 20:40:19,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [643965697] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:19,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:19,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:40:19,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564168307] [2022-04-06 20:40:19,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:19,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:40:19,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:40:19,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:40:19,433 INFO L87 Difference]: Start difference. First operand 746 states and 1012 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:40:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:21,556 INFO L93 Difference]: Finished difference Result 1021 states and 1302 transitions. [2022-04-06 20:40:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:40:21,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 47 [2022-04-06 20:40:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:21,558 INFO L225 Difference]: With dead ends: 1021 [2022-04-06 20:40:21,558 INFO L226 Difference]: Without dead ends: 998 [2022-04-06 20:40:21,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=731, Invalid=2691, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:40:21,558 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 91 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:21,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 152 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-04-06 20:40:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 746. [2022-04-06 20:40:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 741 states have (on average 1.358974358974359) internal successors, (1007), 741 states have internal predecessors, (1007), 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 20:40:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1011 transitions. [2022-04-06 20:40:21,949 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1011 transitions. Word has length 47 [2022-04-06 20:40:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:21,949 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 1011 transitions. [2022-04-06 20:40:21,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 20:40:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1011 transitions. [2022-04-06 20:40:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:21,950 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:21,950 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:21,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:22,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-04-06 20:40:22,151 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:22,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash -238421928, now seen corresponding path program 63 times [2022-04-06 20:40:22,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:22,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060561607] [2022-04-06 20:40:22,151 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:22,152 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash -238421928, now seen corresponding path program 64 times [2022-04-06 20:40:22,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:22,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432691709] [2022-04-06 20:40:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:22,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:22,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:22,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:22,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432691709] [2022-04-06 20:40:22,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432691709] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:22,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503142695] [2022-04-06 20:40:22,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:22,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:22,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:22,670 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:22,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 20:40:22,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:22,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:22,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:40:22,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:22,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:24,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503142695] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:24,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:24,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:40:24,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:24,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060561607] [2022-04-06 20:40:24,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060561607] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:24,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:24,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:40:24,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168091811] [2022-04-06 20:40:24,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:24,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:40:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:40:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=3880, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:40:24,265 INFO L87 Difference]: Start difference. First operand 746 states and 1011 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 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 20:40:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:29,064 INFO L93 Difference]: Finished difference Result 1287 states and 1973 transitions. [2022-04-06 20:40:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:40:29,065 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 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 20:40:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:29,066 INFO L225 Difference]: With dead ends: 1287 [2022-04-06 20:40:29,066 INFO L226 Difference]: Without dead ends: 1251 [2022-04-06 20:40:29,067 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2492, Invalid=8638, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:40:29,067 INFO L913 BasicCegarLoop]: 149 mSDtfsCounter, 249 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 9041 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 9220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 9041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:29,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 321 Invalid, 9220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 9041 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:40:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-04-06 20:40:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 771. [2022-04-06 20:40:29,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 766 states have (on average 1.3629242819843341) internal successors, (1044), 766 states have internal predecessors, (1044), 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 20:40:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1048 transitions. [2022-04-06 20:40:29,465 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1048 transitions. Word has length 47 [2022-04-06 20:40:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:29,465 INFO L478 AbstractCegarLoop]: Abstraction has 771 states and 1048 transitions. [2022-04-06 20:40:29,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 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 20:40:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1048 transitions. [2022-04-06 20:40:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:40:29,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:29,466 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:29,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-04-06 20:40:29,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-06 20:40:29,666 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:29,666 INFO L85 PathProgramCache]: Analyzing trace with hash -648960224, now seen corresponding path program 119 times [2022-04-06 20:40:29,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:29,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [229125929] [2022-04-06 20:40:29,667 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:29,667 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash -648960224, now seen corresponding path program 120 times [2022-04-06 20:40:29,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:29,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881394210] [2022-04-06 20:40:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:29,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:29,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:40:29,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:29,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881394210] [2022-04-06 20:40:29,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881394210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:29,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385896242] [2022-04-06 20:40:29,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:29,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:29,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:29,797 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:29,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 20:40:29,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:40:29,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:29,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:40:29,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:40:29,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:40:30,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385896242] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:30,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:30,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-04-06 20:40:30,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:30,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [229125929] [2022-04-06 20:40:30,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [229125929] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:30,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:30,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:40:30,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995510832] [2022-04-06 20:40:30,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:30,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:40:30,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:30,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:40:30,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:40:30,054 INFO L87 Difference]: Start difference. First operand 771 states and 1048 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:30,976 INFO L93 Difference]: Finished difference Result 804 states and 1082 transitions. [2022-04-06 20:40:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:40:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:40:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:30,977 INFO L225 Difference]: With dead ends: 804 [2022-04-06 20:40:30,977 INFO L226 Difference]: Without dead ends: 770 [2022-04-06 20:40:30,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:40:30,978 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 52 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:30,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 88 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:40:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-04-06 20:40:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 762. [2022-04-06 20:40:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 757 states have (on average 1.3659180977542933) internal successors, (1034), 757 states have internal predecessors, (1034), 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 20:40:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1038 transitions. [2022-04-06 20:40:31,406 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1038 transitions. Word has length 48 [2022-04-06 20:40:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:31,406 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1038 transitions. [2022-04-06 20:40:31,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1038 transitions. [2022-04-06 20:40:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:40:31,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:31,407 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:31,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-04-06 20:40:31,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 20:40:31,607 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash 908676400, now seen corresponding path program 41 times [2022-04-06 20:40:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:31,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1832779752] [2022-04-06 20:40:31,608 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:31,608 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash 908676400, now seen corresponding path program 42 times [2022-04-06 20:40:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:31,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542105233] [2022-04-06 20:40:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:31,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:40:31,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:31,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542105233] [2022-04-06 20:40:31,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542105233] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:31,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928596388] [2022-04-06 20:40:31,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:31,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:31,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:31,940 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:31,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 20:40:32,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:40:32,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:32,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:40:32,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:40:32,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:40:32,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928596388] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:32,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:32,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 36 [2022-04-06 20:40:32,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:32,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1832779752] [2022-04-06 20:40:32,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1832779752] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:32,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:32,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:40:32,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879980601] [2022-04-06 20:40:32,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:32,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:40:32,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:40:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=970, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:40:32,676 INFO L87 Difference]: Start difference. First operand 762 states and 1038 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:34,106 INFO L93 Difference]: Finished difference Result 846 states and 1167 transitions. [2022-04-06 20:40:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:40:34,107 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:40:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:34,108 INFO L225 Difference]: With dead ends: 846 [2022-04-06 20:40:34,108 INFO L226 Difference]: Without dead ends: 841 [2022-04-06 20:40:34,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=709, Invalid=2597, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:40:34,108 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 129 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:34,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 75 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-04-06 20:40:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 820. [2022-04-06 20:40:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 815 states have (on average 1.3693251533742332) internal successors, (1116), 815 states have internal predecessors, (1116), 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 20:40:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1120 transitions. [2022-04-06 20:40:34,580 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1120 transitions. Word has length 48 [2022-04-06 20:40:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:34,581 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1120 transitions. [2022-04-06 20:40:34,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1120 transitions. [2022-04-06 20:40:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:40:34,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:34,582 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:34,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-04-06 20:40:34,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:34,782 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:34,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2059407519, now seen corresponding path program 65 times [2022-04-06 20:40:34,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:34,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [767050459] [2022-04-06 20:40:34,783 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:34,783 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:34,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2059407519, now seen corresponding path program 66 times [2022-04-06 20:40:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:34,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564863245] [2022-04-06 20:40:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:34,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:35,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:35,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:35,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564863245] [2022-04-06 20:40:35,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564863245] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:35,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959928057] [2022-04-06 20:40:35,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:35,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:35,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:35,322 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:35,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 20:40:38,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-06 20:40:38,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:40:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:38,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:40,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959928057] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:40,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:40,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 20:40:40,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:40,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [767050459] [2022-04-06 20:40:40,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [767050459] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:40,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:40,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:40:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301308947] [2022-04-06 20:40:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:40,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:40:40,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:40,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:40:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=4099, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:40:40,328 INFO L87 Difference]: Start difference. First operand 820 states and 1120 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:45,638 INFO L93 Difference]: Finished difference Result 1424 states and 2193 transitions. [2022-04-06 20:40:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:40:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:40:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:45,640 INFO L225 Difference]: With dead ends: 1424 [2022-04-06 20:40:45,640 INFO L226 Difference]: Without dead ends: 1385 [2022-04-06 20:40:45,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2635, Invalid=9137, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:40:45,641 INFO L913 BasicCegarLoop]: 151 mSDtfsCounter, 255 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 9484 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 9671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 9484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:45,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 328 Invalid, 9671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 9484 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 20:40:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-04-06 20:40:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 847. [2022-04-06 20:40:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 842 states have (on average 1.3729216152019001) internal successors, (1156), 842 states have internal predecessors, (1156), 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 20:40:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1160 transitions. [2022-04-06 20:40:46,126 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1160 transitions. Word has length 48 [2022-04-06 20:40:46,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:46,126 INFO L478 AbstractCegarLoop]: Abstraction has 847 states and 1160 transitions. [2022-04-06 20:40:46,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1160 transitions. [2022-04-06 20:40:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:40:46,127 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:46,127 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:46,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:46,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:46,328 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:46,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:46,328 INFO L85 PathProgramCache]: Analyzing trace with hash -603922842, now seen corresponding path program 121 times [2022-04-06 20:40:46,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:46,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2095376016] [2022-04-06 20:40:46,329 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:46,329 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash -603922842, now seen corresponding path program 122 times [2022-04-06 20:40:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:46,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352164970] [2022-04-06 20:40:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:46,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:46,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-04-06 20:40:46,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:46,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352164970] [2022-04-06 20:40:46,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352164970] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:46,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379262822] [2022-04-06 20:40:46,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:46,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:46,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:46,547 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:46,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 20:40:46,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:46,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:46,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:40:46,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-04-06 20:40:46,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-04-06 20:40:47,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379262822] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:47,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:47,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:40:47,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:47,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2095376016] [2022-04-06 20:40:47,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2095376016] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:47,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:47,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:40:47,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219209815] [2022-04-06 20:40:47,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:47,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:40:47,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:40:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:40:47,142 INFO L87 Difference]: Start difference. First operand 847 states and 1160 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:49,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:49,199 INFO L93 Difference]: Finished difference Result 1014 states and 1338 transitions. [2022-04-06 20:40:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:40:49,199 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:40:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:49,200 INFO L225 Difference]: With dead ends: 1014 [2022-04-06 20:40:49,200 INFO L226 Difference]: Without dead ends: 990 [2022-04-06 20:40:49,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=933, Invalid=4179, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:40:49,200 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 45 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:49,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 113 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:40:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-04-06 20:40:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 847. [2022-04-06 20:40:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 842 states have (on average 1.3717339667458432) internal successors, (1155), 842 states have internal predecessors, (1155), 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 20:40:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1159 transitions. [2022-04-06 20:40:49,672 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1159 transitions. Word has length 49 [2022-04-06 20:40:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:49,672 INFO L478 AbstractCegarLoop]: Abstraction has 847 states and 1159 transitions. [2022-04-06 20:40:49,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1159 transitions. [2022-04-06 20:40:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:40:49,673 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:49,673 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:49,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-04-06 20:40:49,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-04-06 20:40:49,873 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2070384218, now seen corresponding path program 43 times [2022-04-06 20:40:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:49,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1281221040] [2022-04-06 20:40:49,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:49,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:49,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2070384218, now seen corresponding path program 44 times [2022-04-06 20:40:49,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:49,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275223571] [2022-04-06 20:40:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:49,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:50,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:40:50,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275223571] [2022-04-06 20:40:50,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275223571] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978707397] [2022-04-06 20:40:50,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:50,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:50,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:50,171 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:50,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 20:40:50,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:50,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:50,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:40:50,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:40:50,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:40:51,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978707397] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:51,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:51,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 63 [2022-04-06 20:40:51,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:51,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1281221040] [2022-04-06 20:40:51,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1281221040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:51,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:51,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:40:51,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21650426] [2022-04-06 20:40:51,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:51,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:40:51,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:51,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:40:51,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=3327, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:40:51,408 INFO L87 Difference]: Start difference. First operand 847 states and 1159 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:40:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:54,867 INFO L93 Difference]: Finished difference Result 1013 states and 1334 transitions. [2022-04-06 20:40:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 20:40:54,867 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 49 [2022-04-06 20:40:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:54,868 INFO L225 Difference]: With dead ends: 1013 [2022-04-06 20:40:54,868 INFO L226 Difference]: Without dead ends: 927 [2022-04-06 20:40:54,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6705 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3258, Invalid=22824, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 20:40:54,869 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3248 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 3439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 3248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:54,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 150 Invalid, 3439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 3248 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:40:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-04-06 20:40:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 846. [2022-04-06 20:40:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 841 states have (on average 1.3650416171224733) internal successors, (1148), 841 states have internal predecessors, (1148), 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 20:40:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1152 transitions. [2022-04-06 20:40:55,346 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1152 transitions. Word has length 49 [2022-04-06 20:40:55,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:55,346 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 1152 transitions. [2022-04-06 20:40:55,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:40:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1152 transitions. [2022-04-06 20:40:55,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:40:55,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:55,347 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:55,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-04-06 20:40:55,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:55,549 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash -392111368, now seen corresponding path program 123 times [2022-04-06 20:40:55,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:55,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [732100065] [2022-04-06 20:40:55,550 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:55,550 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:55,550 INFO L85 PathProgramCache]: Analyzing trace with hash -392111368, now seen corresponding path program 124 times [2022-04-06 20:40:55,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:55,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406658149] [2022-04-06 20:40:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:55,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:55,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 20:40:55,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406658149] [2022-04-06 20:40:55,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406658149] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323515363] [2022-04-06 20:40:55,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:55,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:55,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:55,768 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:55,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 20:40:55,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:55,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:40:55,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 20:40:55,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 20:40:56,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323515363] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:56,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:56,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:40:56,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:56,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [732100065] [2022-04-06 20:40:56,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [732100065] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:56,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:56,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:40:56,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52399370] [2022-04-06 20:40:56,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:56,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:40:56,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:56,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:40:56,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:40:56,362 INFO L87 Difference]: Start difference. First operand 846 states and 1152 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:58,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:58,598 INFO L93 Difference]: Finished difference Result 1041 states and 1359 transitions. [2022-04-06 20:40:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:40:58,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:40:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:58,599 INFO L225 Difference]: With dead ends: 1041 [2022-04-06 20:40:58,599 INFO L226 Difference]: Without dead ends: 1017 [2022-04-06 20:40:58,600 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=985, Invalid=4271, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:40:58,600 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 52 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:58,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 124 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-04-06 20:40:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 846. [2022-04-06 20:40:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 841 states have (on average 1.3638525564803805) internal successors, (1147), 841 states have internal predecessors, (1147), 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 20:40:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1151 transitions. [2022-04-06 20:40:59,072 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1151 transitions. Word has length 49 [2022-04-06 20:40:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:59,072 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 1151 transitions. [2022-04-06 20:40:59,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1151 transitions. [2022-04-06 20:40:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:40:59,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:59,073 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:59,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-04-06 20:40:59,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:59,274 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1554383910, now seen corresponding path program 125 times [2022-04-06 20:40:59,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:59,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [66273068] [2022-04-06 20:40:59,275 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:59,275 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:59,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1554383910, now seen corresponding path program 126 times [2022-04-06 20:40:59,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:59,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296085500] [2022-04-06 20:40:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:59,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:59,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-04-06 20:40:59,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:59,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296085500] [2022-04-06 20:40:59,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296085500] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:59,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796405114] [2022-04-06 20:40:59,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:59,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:59,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:59,533 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:59,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 20:41:00,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:41:00,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:00,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:41:00,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-04-06 20:41:00,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-04-06 20:41:00,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796405114] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:00,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:00,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:41:00,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:00,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [66273068] [2022-04-06 20:41:00,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [66273068] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:00,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:00,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:41:00,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146440234] [2022-04-06 20:41:00,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:00,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:41:00,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:41:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:41:00,732 INFO L87 Difference]: Start difference. First operand 846 states and 1151 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:03,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:03,149 INFO L93 Difference]: Finished difference Result 1070 states and 1388 transitions. [2022-04-06 20:41:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:41:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:41:03,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:03,151 INFO L225 Difference]: With dead ends: 1070 [2022-04-06 20:41:03,151 INFO L226 Difference]: Without dead ends: 1046 [2022-04-06 20:41:03,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=4021, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:41:03,151 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 61 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:03,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 148 Invalid, 2019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1935 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-04-06 20:41:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 846. [2022-04-06 20:41:03,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 841 states have (on average 1.3626634958382877) internal successors, (1146), 841 states have internal predecessors, (1146), 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 20:41:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1150 transitions. [2022-04-06 20:41:03,625 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1150 transitions. Word has length 49 [2022-04-06 20:41:03,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:03,625 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 1150 transitions. [2022-04-06 20:41:03,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:03,625 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1150 transitions. [2022-04-06 20:41:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:41:03,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:03,626 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:03,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:03,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:03,829 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:03,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1340079416, now seen corresponding path program 127 times [2022-04-06 20:41:03,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:03,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [602797767] [2022-04-06 20:41:03,832 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:03,832 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:03,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1340079416, now seen corresponding path program 128 times [2022-04-06 20:41:03,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:03,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283550562] [2022-04-06 20:41:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:03,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:04,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 20:41:04,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:04,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283550562] [2022-04-06 20:41:04,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283550562] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:04,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910120464] [2022-04-06 20:41:04,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:04,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:04,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:04,058 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:04,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 20:41:04,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:04,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:04,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:41:04,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 20:41:04,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 20:41:04,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910120464] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:04,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:04,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:41:04,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [602797767] [2022-04-06 20:41:04,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [602797767] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:04,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:04,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:41:04,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641170436] [2022-04-06 20:41:04,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:04,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:41:04,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:04,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:41:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1396, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:41:04,667 INFO L87 Difference]: Start difference. First operand 846 states and 1150 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:07,140 INFO L93 Difference]: Finished difference Result 1100 states and 1418 transitions. [2022-04-06 20:41:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:41:07,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:41:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:07,142 INFO L225 Difference]: With dead ends: 1100 [2022-04-06 20:41:07,142 INFO L226 Difference]: Without dead ends: 1076 [2022-04-06 20:41:07,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=869, Invalid=3553, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:41:07,143 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 69 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:07,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 149 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1951 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-04-06 20:41:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 846. [2022-04-06 20:41:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 841 states have (on average 1.361474435196195) internal successors, (1145), 841 states have internal predecessors, (1145), 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 20:41:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1149 transitions. [2022-04-06 20:41:07,623 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1149 transitions. Word has length 49 [2022-04-06 20:41:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:07,623 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 1149 transitions. [2022-04-06 20:41:07,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1149 transitions. [2022-04-06 20:41:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:41:07,624 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:07,624 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:07,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-04-06 20:41:07,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:07,824 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash -606496282, now seen corresponding path program 129 times [2022-04-06 20:41:07,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:07,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136365708] [2022-04-06 20:41:07,825 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:07,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:07,825 INFO L85 PathProgramCache]: Analyzing trace with hash -606496282, now seen corresponding path program 130 times [2022-04-06 20:41:07,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:07,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014663248] [2022-04-06 20:41:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:07,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:08,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 20:41:08,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:08,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014663248] [2022-04-06 20:41:08,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014663248] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798824648] [2022-04-06 20:41:08,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:08,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:08,040 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:08,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 20:41:08,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:08,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:08,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:41:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 20:41:08,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 20:41:08,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798824648] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:08,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:08,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:41:08,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:08,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136365708] [2022-04-06 20:41:08,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136365708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:08,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:08,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:41:08,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267742144] [2022-04-06 20:41:08,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:08,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:41:08,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:08,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:41:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:41:08,657 INFO L87 Difference]: Start difference. First operand 846 states and 1149 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:11,154 INFO L93 Difference]: Finished difference Result 1131 states and 1449 transitions. [2022-04-06 20:41:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:41:11,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:41:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:11,156 INFO L225 Difference]: With dead ends: 1131 [2022-04-06 20:41:11,156 INFO L226 Difference]: Without dead ends: 1107 [2022-04-06 20:41:11,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=3210, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:41:11,156 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 78 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:11,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 150 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1963 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-04-06 20:41:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 846. [2022-04-06 20:41:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 841 states have (on average 1.3602853745541024) internal successors, (1144), 841 states have internal predecessors, (1144), 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 20:41:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1148 transitions. [2022-04-06 20:41:11,634 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1148 transitions. Word has length 49 [2022-04-06 20:41:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:11,634 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 1148 transitions. [2022-04-06 20:41:11,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1148 transitions. [2022-04-06 20:41:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:41:11,635 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:11,635 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:11,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-04-06 20:41:11,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-04-06 20:41:11,851 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1963110264, now seen corresponding path program 131 times [2022-04-06 20:41:11,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:11,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [292701140] [2022-04-06 20:41:11,852 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:11,852 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1963110264, now seen corresponding path program 132 times [2022-04-06 20:41:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:11,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922278748] [2022-04-06 20:41:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:12,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-04-06 20:41:12,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:12,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922278748] [2022-04-06 20:41:12,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922278748] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:12,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158377184] [2022-04-06 20:41:12,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:12,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:12,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:12,067 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:12,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 20:41:12,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:41:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:12,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:41:12,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-04-06 20:41:12,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-04-06 20:41:12,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158377184] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:12,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:12,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 6, 6] total 28 [2022-04-06 20:41:12,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [292701140] [2022-04-06 20:41:12,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [292701140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:12,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:12,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:41:12,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636071741] [2022-04-06 20:41:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:12,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:41:12,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:41:12,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:41:12,407 INFO L87 Difference]: Start difference. First operand 846 states and 1148 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:15,029 INFO L93 Difference]: Finished difference Result 1163 states and 1481 transitions. [2022-04-06 20:41:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:41:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:41:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:15,031 INFO L225 Difference]: With dead ends: 1163 [2022-04-06 20:41:15,031 INFO L226 Difference]: Without dead ends: 1139 [2022-04-06 20:41:15,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=2091, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:41:15,031 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 92 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:15,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 159 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:41:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-04-06 20:41:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 846. [2022-04-06 20:41:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 841 states have (on average 1.3590963139120096) internal successors, (1143), 841 states have internal predecessors, (1143), 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 20:41:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1147 transitions. [2022-04-06 20:41:15,512 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1147 transitions. Word has length 49 [2022-04-06 20:41:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:15,512 INFO L478 AbstractCegarLoop]: Abstraction has 846 states and 1147 transitions. [2022-04-06 20:41:15,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1147 transitions. [2022-04-06 20:41:15,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:41:15,513 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:15,513 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:15,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:15,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-06 20:41:15,714 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:15,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:15,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1619581304, now seen corresponding path program 67 times [2022-04-06 20:41:15,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:15,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [705863755] [2022-04-06 20:41:15,715 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:15,715 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:15,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1619581304, now seen corresponding path program 68 times [2022-04-06 20:41:15,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:15,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788249232] [2022-04-06 20:41:15,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:15,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:16,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:16,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:16,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788249232] [2022-04-06 20:41:16,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788249232] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:16,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13844] [2022-04-06 20:41:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:16,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:16,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:16,282 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:16,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 20:41:16,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:16,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:16,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:41:16,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:16,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:18,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13844] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:18,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:18,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:41:18,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [705863755] [2022-04-06 20:41:18,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [705863755] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:18,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:18,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:41:18,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825702608] [2022-04-06 20:41:18,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:18,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:41:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:41:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4324, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:41:18,045 INFO L87 Difference]: Start difference. First operand 846 states and 1147 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 20:41:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:23,703 INFO L93 Difference]: Finished difference Result 1464 states and 2247 transitions. [2022-04-06 20:41:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:41:23,704 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 20:41:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:23,705 INFO L225 Difference]: With dead ends: 1464 [2022-04-06 20:41:23,705 INFO L226 Difference]: Without dead ends: 1425 [2022-04-06 20:41:23,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2782, Invalid=9650, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:41:23,706 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 257 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 10150 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 10336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 10150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:23,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 340 Invalid, 10336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 10150 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 20:41:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2022-04-06 20:41:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 873. [2022-04-06 20:41:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 868 states have (on average 1.3629032258064515) internal successors, (1183), 868 states have internal predecessors, (1183), 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 20:41:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1187 transitions. [2022-04-06 20:41:24,197 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1187 transitions. Word has length 49 [2022-04-06 20:41:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:24,197 INFO L478 AbstractCegarLoop]: Abstraction has 873 states and 1187 transitions. [2022-04-06 20:41:24,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 20:41:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1187 transitions. [2022-04-06 20:41:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:41:24,198 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:24,198 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:24,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:24,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:24,401 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:24,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash -295882175, now seen corresponding path program 69 times [2022-04-06 20:41:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:24,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [187337775] [2022-04-06 20:41:24,402 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:24,402 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash -295882175, now seen corresponding path program 70 times [2022-04-06 20:41:24,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:24,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480763393] [2022-04-06 20:41:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:24,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:25,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:25,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:25,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480763393] [2022-04-06 20:41:25,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480763393] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:25,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899879944] [2022-04-06 20:41:25,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:25,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:25,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:25,045 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:25,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 20:41:25,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:25,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:25,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:41:25,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:25,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:26,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899879944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:26,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:26,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 20:41:26,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:26,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [187337775] [2022-04-06 20:41:26,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [187337775] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:26,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:26,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:41:26,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726629867] [2022-04-06 20:41:26,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:26,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:41:26,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:26,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:41:26,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1451, Invalid=4555, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:41:26,881 INFO L87 Difference]: Start difference. First operand 873 states and 1187 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:32,777 INFO L93 Difference]: Finished difference Result 1505 states and 2314 transitions. [2022-04-06 20:41:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:41:32,777 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:41:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:32,779 INFO L225 Difference]: With dead ends: 1505 [2022-04-06 20:41:32,779 INFO L226 Difference]: Without dead ends: 1466 [2022-04-06 20:41:32,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2933, Invalid=10177, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:41:32,780 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 274 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 10690 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 10890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 10690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:32,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 348 Invalid, 10890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 10690 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 20:41:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-04-06 20:41:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 900. [2022-04-06 20:41:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 895 states have (on average 1.3664804469273744) internal successors, (1223), 895 states have internal predecessors, (1223), 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 20:41:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1227 transitions. [2022-04-06 20:41:33,281 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1227 transitions. Word has length 50 [2022-04-06 20:41:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:33,282 INFO L478 AbstractCegarLoop]: Abstraction has 900 states and 1227 transitions. [2022-04-06 20:41:33,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1227 transitions. [2022-04-06 20:41:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:41:33,283 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:33,283 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:33,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:33,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-06 20:41:33,483 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:33,484 INFO L85 PathProgramCache]: Analyzing trace with hash -416286264, now seen corresponding path program 133 times [2022-04-06 20:41:33,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:33,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1025855251] [2022-04-06 20:41:33,484 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:33,484 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash -416286264, now seen corresponding path program 134 times [2022-04-06 20:41:33,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:33,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327943570] [2022-04-06 20:41:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:33,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:34,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:41:34,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:34,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327943570] [2022-04-06 20:41:34,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327943570] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:34,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449161149] [2022-04-06 20:41:34,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:34,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:34,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:34,725 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:34,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 20:41:35,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:35,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 118 conjunts are in the unsatisfiable core [2022-04-06 20:41:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:36,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:42,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449161149] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:42,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:42,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 42, 32] total 93 [2022-04-06 20:41:42,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1025855251] [2022-04-06 20:41:42,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1025855251] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:42,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:42,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:41:42,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918962046] [2022-04-06 20:41:42,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:42,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:41:42,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:41:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1146, Invalid=7409, Unknown=1, NotChecked=0, Total=8556 [2022-04-06 20:41:42,869 INFO L87 Difference]: Start difference. First operand 900 states and 1227 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:47,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:47,342 INFO L93 Difference]: Finished difference Result 925 states and 1252 transitions. [2022-04-06 20:41:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:41:47,343 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:41:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:47,344 INFO L225 Difference]: With dead ends: 925 [2022-04-06 20:41:47,344 INFO L226 Difference]: Without dead ends: 920 [2022-04-06 20:41:47,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3482 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1431, Invalid=12140, Unknown=1, NotChecked=0, Total=13572 [2022-04-06 20:41:47,344 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:47,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 128 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:41:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-04-06 20:41:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 900. [2022-04-06 20:41:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 895 states have (on average 1.3664804469273744) internal successors, (1223), 895 states have internal predecessors, (1223), 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 20:41:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1227 transitions. [2022-04-06 20:41:47,868 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1227 transitions. Word has length 51 [2022-04-06 20:41:47,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:47,868 INFO L478 AbstractCegarLoop]: Abstraction has 900 states and 1227 transitions. [2022-04-06 20:41:47,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1227 transitions. [2022-04-06 20:41:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:41:47,869 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:47,869 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:47,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-04-06 20:41:48,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-04-06 20:41:48,070 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:48,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1273016408, now seen corresponding path program 135 times [2022-04-06 20:41:48,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:48,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1148826807] [2022-04-06 20:41:48,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:48,071 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:48,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1273016408, now seen corresponding path program 136 times [2022-04-06 20:41:48,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:48,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458156150] [2022-04-06 20:41:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:48,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:48,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-04-06 20:41:48,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:48,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458156150] [2022-04-06 20:41:48,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458156150] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:48,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785544464] [2022-04-06 20:41:48,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:48,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:48,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:48,312 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:48,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 20:41:48,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:48,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:48,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:41:48,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-04-06 20:41:48,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-04-06 20:41:48,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785544464] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:48,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:48,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:41:48,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:48,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1148826807] [2022-04-06 20:41:48,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1148826807] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:48,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:48,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:41:48,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137088127] [2022-04-06 20:41:48,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:48,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:41:48,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:48,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:41:48,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:41:48,959 INFO L87 Difference]: Start difference. First operand 900 states and 1227 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:41:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:51,391 INFO L93 Difference]: Finished difference Result 1076 states and 1415 transitions. [2022-04-06 20:41:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:41:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 51 [2022-04-06 20:41:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:51,393 INFO L225 Difference]: With dead ends: 1076 [2022-04-06 20:41:51,393 INFO L226 Difference]: Without dead ends: 1051 [2022-04-06 20:41:51,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1126, Invalid=5036, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:41:51,394 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 54 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:51,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 130 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:41:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-04-06 20:41:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 900. [2022-04-06 20:41:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 895 states have (on average 1.3653631284916201) internal successors, (1222), 895 states have internal predecessors, (1222), 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 20:41:51,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1226 transitions. [2022-04-06 20:41:51,919 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1226 transitions. Word has length 51 [2022-04-06 20:41:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:51,919 INFO L478 AbstractCegarLoop]: Abstraction has 900 states and 1226 transitions. [2022-04-06 20:41:51,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:41:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1226 transitions. [2022-04-06 20:41:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:41:51,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:51,920 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:51,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-04-06 20:41:52,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-04-06 20:41:52,121 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:52,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1864870824, now seen corresponding path program 45 times [2022-04-06 20:41:52,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:52,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589951663] [2022-04-06 20:41:52,122 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:52,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:52,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1864870824, now seen corresponding path program 46 times [2022-04-06 20:41:52,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:52,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230467421] [2022-04-06 20:41:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:52,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:52,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:41:52,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:52,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230467421] [2022-04-06 20:41:52,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230467421] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:52,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289953502] [2022-04-06 20:41:52,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:52,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:52,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:52,612 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:52,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 20:41:52,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:52,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:41:52,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:41:52,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:41:53,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289953502] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:53,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:53,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 15] total 39 [2022-04-06 20:41:53,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:53,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [589951663] [2022-04-06 20:41:53,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [589951663] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:53,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:53,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:41:53,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084328900] [2022-04-06 20:41:53,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:53,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:41:53,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:53,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:41:53,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:41:53,008 INFO L87 Difference]: Start difference. First operand 900 states and 1226 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:54,928 INFO L93 Difference]: Finished difference Result 1011 states and 1386 transitions. [2022-04-06 20:41:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:41:54,929 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:41:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:54,930 INFO L225 Difference]: With dead ends: 1011 [2022-04-06 20:41:54,930 INFO L226 Difference]: Without dead ends: 1006 [2022-04-06 20:41:54,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=833, Invalid=3073, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:41:54,930 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 159 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:54,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 83 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-04-06 20:41:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 963. [2022-04-06 20:41:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.3684759916492693) internal successors, (1311), 958 states have internal predecessors, (1311), 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 20:41:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1315 transitions. [2022-04-06 20:41:55,515 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1315 transitions. Word has length 51 [2022-04-06 20:41:55,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:55,515 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1315 transitions. [2022-04-06 20:41:55,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:55,515 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1315 transitions. [2022-04-06 20:41:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:41:55,516 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:55,516 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:55,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-04-06 20:41:55,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-06 20:41:55,731 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:55,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:55,731 INFO L85 PathProgramCache]: Analyzing trace with hash -637151800, now seen corresponding path program 137 times [2022-04-06 20:41:55,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:55,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916639393] [2022-04-06 20:41:55,735 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:55,735 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:55,735 INFO L85 PathProgramCache]: Analyzing trace with hash -637151800, now seen corresponding path program 138 times [2022-04-06 20:41:55,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:55,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349659766] [2022-04-06 20:41:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:55,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:55,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:41:55,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:55,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349659766] [2022-04-06 20:41:55,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349659766] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:55,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795588327] [2022-04-06 20:41:55,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:55,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:55,977 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:55,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 20:41:56,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:41:56,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:56,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:41:56,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:41:56,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:41:57,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795588327] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:57,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:57,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:41:57,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916639393] [2022-04-06 20:41:57,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916639393] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:57,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:57,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:41:57,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556565634] [2022-04-06 20:41:57,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:57,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:41:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:41:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:41:57,133 INFO L87 Difference]: Start difference. First operand 963 states and 1315 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:42:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:00,017 INFO L93 Difference]: Finished difference Result 1194 states and 1559 transitions. [2022-04-06 20:42:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:42:00,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 51 [2022-04-06 20:42:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:00,018 INFO L225 Difference]: With dead ends: 1194 [2022-04-06 20:42:00,018 INFO L226 Difference]: Without dead ends: 1169 [2022-04-06 20:42:00,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1119, Invalid=4887, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:42:00,019 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 61 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:00,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 146 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:42:00,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-04-06 20:42:00,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 963. [2022-04-06 20:42:00,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.3674321503131524) internal successors, (1310), 958 states have internal predecessors, (1310), 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 20:42:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1314 transitions. [2022-04-06 20:42:00,605 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1314 transitions. Word has length 51 [2022-04-06 20:42:00,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:00,605 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1314 transitions. [2022-04-06 20:42:00,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:42:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1314 transitions. [2022-04-06 20:42:00,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:00,606 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:00,606 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:00,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:00,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:00,810 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:00,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:00,810 INFO L85 PathProgramCache]: Analyzing trace with hash 686703192, now seen corresponding path program 139 times [2022-04-06 20:42:00,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:00,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [384696520] [2022-04-06 20:42:00,811 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:00,811 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:00,811 INFO L85 PathProgramCache]: Analyzing trace with hash 686703192, now seen corresponding path program 140 times [2022-04-06 20:42:00,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:00,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781456106] [2022-04-06 20:42:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:00,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:01,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:42:01,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:01,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781456106] [2022-04-06 20:42:01,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781456106] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:01,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477846766] [2022-04-06 20:42:01,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:01,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:01,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:01,065 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:01,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-06 20:42:01,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:01,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:01,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:42:01,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:42:01,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:42:01,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477846766] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:01,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:01,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:42:01,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [384696520] [2022-04-06 20:42:01,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [384696520] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:01,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:01,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:42:01,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42833682] [2022-04-06 20:42:01,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:01,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:42:01,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:42:01,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:42:01,745 INFO L87 Difference]: Start difference. First operand 963 states and 1314 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:42:04,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:04,686 INFO L93 Difference]: Finished difference Result 1225 states and 1590 transitions. [2022-04-06 20:42:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:42:04,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 51 [2022-04-06 20:42:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:04,687 INFO L225 Difference]: With dead ends: 1225 [2022-04-06 20:42:04,687 INFO L226 Difference]: Without dead ends: 1200 [2022-04-06 20:42:04,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1030, Invalid=4372, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:42:04,688 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 70 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:04,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 141 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:42:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-04-06 20:42:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 963. [2022-04-06 20:42:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.3663883089770354) internal successors, (1309), 958 states have internal predecessors, (1309), 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 20:42:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1313 transitions. [2022-04-06 20:42:05,271 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1313 transitions. Word has length 51 [2022-04-06 20:42:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:05,271 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1313 transitions. [2022-04-06 20:42:05,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:42:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1313 transitions. [2022-04-06 20:42:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:05,272 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:05,272 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:05,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:05,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:05,473 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:05,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1006502856, now seen corresponding path program 141 times [2022-04-06 20:42:05,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:05,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [812706508] [2022-04-06 20:42:05,474 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:05,474 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1006502856, now seen corresponding path program 142 times [2022-04-06 20:42:05,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:05,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550214344] [2022-04-06 20:42:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:05,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:05,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:42:05,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:05,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550214344] [2022-04-06 20:42:05,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550214344] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:05,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169937633] [2022-04-06 20:42:05,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:05,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:05,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:05,716 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:05,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-06 20:42:05,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:05,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:42:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:42:05,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:42:06,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169937633] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:06,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:06,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:42:06,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:06,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [812706508] [2022-04-06 20:42:06,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [812706508] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:06,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:06,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:42:06,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519850233] [2022-04-06 20:42:06,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:06,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:42:06,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:06,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:42:06,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:42:06,385 INFO L87 Difference]: Start difference. First operand 963 states and 1313 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:42:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:09,480 INFO L93 Difference]: Finished difference Result 1257 states and 1622 transitions. [2022-04-06 20:42:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:42:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 51 [2022-04-06 20:42:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:09,481 INFO L225 Difference]: With dead ends: 1257 [2022-04-06 20:42:09,481 INFO L226 Difference]: Without dead ends: 1232 [2022-04-06 20:42:09,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=3881, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:42:09,482 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 78 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:09,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 152 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2085 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:42:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-04-06 20:42:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 963. [2022-04-06 20:42:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.3653444676409185) internal successors, (1308), 958 states have internal predecessors, (1308), 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 20:42:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1312 transitions. [2022-04-06 20:42:10,076 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1312 transitions. Word has length 51 [2022-04-06 20:42:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:10,076 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1312 transitions. [2022-04-06 20:42:10,076 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:42:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1312 transitions. [2022-04-06 20:42:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:10,077 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:10,077 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:10,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:10,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-04-06 20:42:10,277 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:10,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1338485672, now seen corresponding path program 143 times [2022-04-06 20:42:10,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:10,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [324732508] [2022-04-06 20:42:10,278 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:10,278 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:10,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1338485672, now seen corresponding path program 144 times [2022-04-06 20:42:10,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:10,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271125316] [2022-04-06 20:42:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:10,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:10,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 20:42:10,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:10,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271125316] [2022-04-06 20:42:10,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271125316] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:10,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939885048] [2022-04-06 20:42:10,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:10,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:10,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:10,520 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:10,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-06 20:42:10,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:42:10,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:10,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:42:10,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 20:42:10,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 20:42:11,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939885048] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:11,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:11,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8, 8] total 32 [2022-04-06 20:42:11,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:11,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [324732508] [2022-04-06 20:42:11,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [324732508] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:11,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:11,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:42:11,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014892589] [2022-04-06 20:42:11,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:11,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:42:11,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:11,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:42:11,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:42:11,124 INFO L87 Difference]: Start difference. First operand 963 states and 1312 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:42:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:14,305 INFO L93 Difference]: Finished difference Result 1290 states and 1655 transitions. [2022-04-06 20:42:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:42:14,305 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 51 [2022-04-06 20:42:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:14,307 INFO L225 Difference]: With dead ends: 1290 [2022-04-06 20:42:14,307 INFO L226 Difference]: Without dead ends: 1265 [2022-04-06 20:42:14,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:42:14,307 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 87 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2322 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:14,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 163 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2322 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:42:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-04-06 20:42:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 963. [2022-04-06 20:42:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.3643006263048016) internal successors, (1307), 958 states have internal predecessors, (1307), 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 20:42:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2022-04-06 20:42:14,895 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 51 [2022-04-06 20:42:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:14,895 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2022-04-06 20:42:14,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:42:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2022-04-06 20:42:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:14,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:14,896 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:14,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-04-06 20:42:15,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:15,097 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:15,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2049552840, now seen corresponding path program 145 times [2022-04-06 20:42:15,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:15,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1677804992] [2022-04-06 20:42:15,098 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:15,098 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2049552840, now seen corresponding path program 146 times [2022-04-06 20:42:15,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:15,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908229328] [2022-04-06 20:42:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:15,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:15,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 20:42:15,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:15,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908229328] [2022-04-06 20:42:15,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908229328] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:15,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523061603] [2022-04-06 20:42:15,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:15,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:15,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:15,336 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:15,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-06 20:42:15,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:15,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:15,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:42:15,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 20:42:15,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 20:42:16,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523061603] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:16,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:16,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:42:16,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:16,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1677804992] [2022-04-06 20:42:16,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1677804992] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:16,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:16,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:42:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453192193] [2022-04-06 20:42:16,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:16,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:42:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:42:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:42:16,016 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:42:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:19,261 INFO L93 Difference]: Finished difference Result 1324 states and 1689 transitions. [2022-04-06 20:42:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:42:19,261 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 51 [2022-04-06 20:42:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:19,263 INFO L225 Difference]: With dead ends: 1324 [2022-04-06 20:42:19,263 INFO L226 Difference]: Without dead ends: 1299 [2022-04-06 20:42:19,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=889, Invalid=3271, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:42:19,263 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 101 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:19,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 174 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:42:19,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-04-06 20:42:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 963. [2022-04-06 20:42:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.3632567849686847) internal successors, (1306), 958 states have internal predecessors, (1306), 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 20:42:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1310 transitions. [2022-04-06 20:42:19,862 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1310 transitions. Word has length 51 [2022-04-06 20:42:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:19,862 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1310 transitions. [2022-04-06 20:42:19,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 20:42:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1310 transitions. [2022-04-06 20:42:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:19,863 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:19,863 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:19,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:20,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:20,063 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:20,064 INFO L85 PathProgramCache]: Analyzing trace with hash 454292120, now seen corresponding path program 71 times [2022-04-06 20:42:20,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:20,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [879742198] [2022-04-06 20:42:20,064 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:20,064 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:20,064 INFO L85 PathProgramCache]: Analyzing trace with hash 454292120, now seen corresponding path program 72 times [2022-04-06 20:42:20,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:20,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204220955] [2022-04-06 20:42:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:20,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:20,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:20,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:20,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204220955] [2022-04-06 20:42:20,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204220955] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:20,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806447940] [2022-04-06 20:42:20,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:20,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:20,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:20,703 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:20,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-06 20:42:23,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 20:42:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:23,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:42:23,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:23,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:25,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806447940] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:25,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:25,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 20:42:25,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:25,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [879742198] [2022-04-06 20:42:25,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [879742198] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:25,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:25,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:42:25,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492293146] [2022-04-06 20:42:25,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:25,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:42:25,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:25,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:42:25,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1528, Invalid=4792, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:42:25,426 INFO L87 Difference]: Start difference. First operand 963 states and 1310 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 20:42:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:31,974 INFO L93 Difference]: Finished difference Result 1661 states and 2555 transitions. [2022-04-06 20:42:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:42:31,974 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 20:42:31,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:31,975 INFO L225 Difference]: With dead ends: 1661 [2022-04-06 20:42:31,976 INFO L226 Difference]: Without dead ends: 1620 [2022-04-06 20:42:31,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3088, Invalid=10718, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:42:31,976 INFO L913 BasicCegarLoop]: 166 mSDtfsCounter, 277 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 11320 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 11520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 11320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:31,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 358 Invalid, 11520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 11320 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:42:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2022-04-06 20:42:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 992. [2022-04-06 20:42:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 987 states have (on average 1.3667679837892603) internal successors, (1349), 987 states have internal predecessors, (1349), 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 20:42:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1353 transitions. [2022-04-06 20:42:32,587 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1353 transitions. Word has length 51 [2022-04-06 20:42:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:32,587 INFO L478 AbstractCegarLoop]: Abstraction has 992 states and 1353 transitions. [2022-04-06 20:42:32,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 20:42:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1353 transitions. [2022-04-06 20:42:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:32,588 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:32,588 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:32,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-04-06 20:42:32,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-06 20:42:32,789 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:32,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:32,789 INFO L85 PathProgramCache]: Analyzing trace with hash 14522800, now seen corresponding path program 147 times [2022-04-06 20:42:32,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:32,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [968415407] [2022-04-06 20:42:32,790 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:32,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:32,790 INFO L85 PathProgramCache]: Analyzing trace with hash 14522800, now seen corresponding path program 148 times [2022-04-06 20:42:32,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:32,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339310270] [2022-04-06 20:42:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:32,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:32,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:42:32,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:32,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339310270] [2022-04-06 20:42:32,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339310270] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:32,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97400590] [2022-04-06 20:42:32,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:32,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:32,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:32,922 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:32,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-06 20:42:32,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:32,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:42:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:42:33,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:42:33,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97400590] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:33,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:33,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-04-06 20:42:33,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:33,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [968415407] [2022-04-06 20:42:33,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [968415407] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:33,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:33,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:42:33,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115775308] [2022-04-06 20:42:33,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:33,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:42:33,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:33,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:42:33,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:42:33,142 INFO L87 Difference]: Start difference. First operand 992 states and 1353 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:34,472 INFO L93 Difference]: Finished difference Result 1028 states and 1390 transitions. [2022-04-06 20:42:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:42:34,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:42:34,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:34,473 INFO L225 Difference]: With dead ends: 1028 [2022-04-06 20:42:34,474 INFO L226 Difference]: Without dead ends: 991 [2022-04-06 20:42:34,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:42:34,474 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:34,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 96 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:42:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-04-06 20:42:35,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 982. [2022-04-06 20:42:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 977 states have (on average 1.3694984646878199) internal successors, (1338), 977 states have internal predecessors, (1338), 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 20:42:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1342 transitions. [2022-04-06 20:42:35,144 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1342 transitions. Word has length 52 [2022-04-06 20:42:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:35,144 INFO L478 AbstractCegarLoop]: Abstraction has 982 states and 1342 transitions. [2022-04-06 20:42:35,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1342 transitions. [2022-04-06 20:42:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:35,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:35,145 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:35,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-04-06 20:42:35,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-06 20:42:35,346 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1031454080, now seen corresponding path program 47 times [2022-04-06 20:42:35,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:35,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [428560567] [2022-04-06 20:42:35,347 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:35,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1031454080, now seen corresponding path program 48 times [2022-04-06 20:42:35,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:35,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485815363] [2022-04-06 20:42:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:35,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:35,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:42:35,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:35,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485815363] [2022-04-06 20:42:35,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485815363] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:35,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359825392] [2022-04-06 20:42:35,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:35,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:35,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:35,690 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:35,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-06 20:42:36,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:42:36,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:36,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 20:42:36,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:42:36,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:42:37,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359825392] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:37,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:37,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2022-04-06 20:42:37,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:37,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [428560567] [2022-04-06 20:42:37,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [428560567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:37,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:37,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:42:37,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415808563] [2022-04-06 20:42:37,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:37,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:42:37,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:42:37,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=3890, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:42:37,479 INFO L87 Difference]: Start difference. First operand 982 states and 1342 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 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 20:42:41,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:41,720 INFO L93 Difference]: Finished difference Result 1174 states and 1543 transitions. [2022-04-06 20:42:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 20:42:41,721 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 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 52 [2022-04-06 20:42:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:41,722 INFO L225 Difference]: With dead ends: 1174 [2022-04-06 20:42:41,722 INFO L226 Difference]: Without dead ends: 1068 [2022-04-06 20:42:41,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8094 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3824, Invalid=27328, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 20:42:41,723 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3779 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 3987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 3779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:41,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 160 Invalid, 3987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 3779 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:42:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-04-06 20:42:42,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 981. [2022-04-06 20:42:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 976 states have (on average 1.3627049180327868) internal successors, (1330), 976 states have internal predecessors, (1330), 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 20:42:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1334 transitions. [2022-04-06 20:42:42,384 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1334 transitions. Word has length 52 [2022-04-06 20:42:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:42,384 INFO L478 AbstractCegarLoop]: Abstraction has 981 states and 1334 transitions. [2022-04-06 20:42:42,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 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 20:42:42,384 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1334 transitions. [2022-04-06 20:42:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:42,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:42,385 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:42,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-04-06 20:42:42,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-06 20:42:42,589 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:42,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2060108511, now seen corresponding path program 73 times [2022-04-06 20:42:42,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:42,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1889481233] [2022-04-06 20:42:42,590 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:42,590 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:42,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2060108511, now seen corresponding path program 74 times [2022-04-06 20:42:42,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:42,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847790640] [2022-04-06 20:42:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:42,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:43,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:43,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:43,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847790640] [2022-04-06 20:42:43,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847790640] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:43,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584816345] [2022-04-06 20:42:43,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:43,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:43,248 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:43,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-06 20:42:43,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:42:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:43,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:45,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584816345] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:45,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:45,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 20:42:45,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:45,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1889481233] [2022-04-06 20:42:45,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1889481233] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:45,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:45,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:42:45,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084652490] [2022-04-06 20:42:45,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:45,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:42:45,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:42:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1607, Invalid=5035, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:42:45,303 INFO L87 Difference]: Start difference. First operand 981 states and 1334 transitions. Second operand has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:52,457 INFO L93 Difference]: Finished difference Result 1696 states and 2610 transitions. [2022-04-06 20:42:52,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:42:52,458 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:42:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:52,459 INFO L225 Difference]: With dead ends: 1696 [2022-04-06 20:42:52,459 INFO L226 Difference]: Without dead ends: 1654 [2022-04-06 20:42:52,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3247, Invalid=11273, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:42:52,460 INFO L913 BasicCegarLoop]: 168 mSDtfsCounter, 282 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 11815 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 12022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 11815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:52,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 365 Invalid, 12022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 11815 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:42:52,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-04-06 20:42:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1010. [2022-04-06 20:42:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1005 states have (on average 1.3661691542288557) internal successors, (1373), 1005 states have internal predecessors, (1373), 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 20:42:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1377 transitions. [2022-04-06 20:42:53,129 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1377 transitions. Word has length 52 [2022-04-06 20:42:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:53,129 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1377 transitions. [2022-04-06 20:42:53,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1377 transitions. [2022-04-06 20:42:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:42:53,130 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:53,131 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:53,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-04-06 20:42:53,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:53,335 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2058591514, now seen corresponding path program 149 times [2022-04-06 20:42:53,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:53,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [590736148] [2022-04-06 20:42:53,336 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:53,336 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2058591514, now seen corresponding path program 150 times [2022-04-06 20:42:53,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:53,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321353203] [2022-04-06 20:42:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:53,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:53,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:42:53,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321353203] [2022-04-06 20:42:53,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321353203] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554312730] [2022-04-06 20:42:53,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:53,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:53,587 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:53,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-04-06 20:42:54,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:42:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:42:54,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:42:54,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:42:55,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554312730] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:55,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:55,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:42:55,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:55,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [590736148] [2022-04-06 20:42:55,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [590736148] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:55,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:55,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:42:55,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082607161] [2022-04-06 20:42:55,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:55,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:42:55,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:42:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1729, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:42:55,008 INFO L87 Difference]: Start difference. First operand 1010 states and 1377 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:58,033 INFO L93 Difference]: Finished difference Result 1222 states and 1602 transitions. [2022-04-06 20:42:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:42:58,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:42:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:58,034 INFO L225 Difference]: With dead ends: 1222 [2022-04-06 20:42:58,034 INFO L226 Difference]: Without dead ends: 1196 [2022-04-06 20:42:58,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1216, Invalid=5426, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:42:58,035 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 53 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:58,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 126 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1698 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:42:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-04-06 20:42:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1010. [2022-04-06 20:42:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1005 states have (on average 1.3651741293532338) internal successors, (1372), 1005 states have internal predecessors, (1372), 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 20:42:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1376 transitions. [2022-04-06 20:42:58,714 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1376 transitions. Word has length 53 [2022-04-06 20:42:58,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:58,714 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1376 transitions. [2022-04-06 20:42:58,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:58,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1376 transitions. [2022-04-06 20:42:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:42:58,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:58,715 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:58,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-04-06 20:42:58,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-04-06 20:42:58,916 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1030653128, now seen corresponding path program 151 times [2022-04-06 20:42:58,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:58,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165766460] [2022-04-06 20:42:58,917 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:58,917 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:58,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1030653128, now seen corresponding path program 152 times [2022-04-06 20:42:58,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:58,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001411797] [2022-04-06 20:42:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:58,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:59,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:42:59,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001411797] [2022-04-06 20:42:59,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001411797] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543208292] [2022-04-06 20:42:59,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:59,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:59,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:59,167 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:59,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-04-06 20:42:59,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:59,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:59,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:42:59,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:42:59,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:42:59,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543208292] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:59,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:59,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:42:59,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:59,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165766460] [2022-04-06 20:42:59,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165766460] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:59,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:59,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:42:59,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675730810] [2022-04-06 20:42:59,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:59,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:42:59,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:42:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:42:59,884 INFO L87 Difference]: Start difference. First operand 1010 states and 1376 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:03,134 INFO L93 Difference]: Finished difference Result 1253 states and 1633 transitions. [2022-04-06 20:43:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:43:03,135 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:43:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:03,136 INFO L225 Difference]: With dead ends: 1253 [2022-04-06 20:43:03,136 INFO L226 Difference]: Without dead ends: 1227 [2022-04-06 20:43:03,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1205, Invalid=5275, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:43:03,137 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 61 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:03,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 140 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:43:03,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-04-06 20:43:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1010. [2022-04-06 20:43:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1005 states have (on average 1.364179104477612) internal successors, (1371), 1005 states have internal predecessors, (1371), 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 20:43:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1375 transitions. [2022-04-06 20:43:03,813 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1375 transitions. Word has length 53 [2022-04-06 20:43:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:03,813 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1375 transitions. [2022-04-06 20:43:03,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1375 transitions. [2022-04-06 20:43:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:03,814 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:03,814 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:03,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-04-06 20:43:04,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-04-06 20:43:04,015 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:04,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1828777818, now seen corresponding path program 153 times [2022-04-06 20:43:04,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:04,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [37514444] [2022-04-06 20:43:04,016 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:04,016 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1828777818, now seen corresponding path program 154 times [2022-04-06 20:43:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:04,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744258805] [2022-04-06 20:43:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:04,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:04,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:43:04,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:04,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744258805] [2022-04-06 20:43:04,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744258805] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:04,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156748330] [2022-04-06 20:43:04,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:04,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:04,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:04,275 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:04,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-04-06 20:43:04,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:04,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:04,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:43:04,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:43:04,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:43:04,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156748330] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:04,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:04,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:43:04,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:04,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [37514444] [2022-04-06 20:43:04,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [37514444] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:04,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:04,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:43:04,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500936899] [2022-04-06 20:43:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:04,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:43:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:43:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:43:04,990 INFO L87 Difference]: Start difference. First operand 1010 states and 1375 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:08,401 INFO L93 Difference]: Finished difference Result 1285 states and 1665 transitions. [2022-04-06 20:43:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:43:08,401 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:43:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:08,403 INFO L225 Difference]: With dead ends: 1285 [2022-04-06 20:43:08,403 INFO L226 Difference]: Without dead ends: 1259 [2022-04-06 20:43:08,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1115, Invalid=4737, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:43:08,403 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 70 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:08,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 155 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:43:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-04-06 20:43:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1010. [2022-04-06 20:43:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1005 states have (on average 1.36318407960199) internal successors, (1370), 1005 states have internal predecessors, (1370), 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 20:43:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1374 transitions. [2022-04-06 20:43:09,079 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1374 transitions. Word has length 53 [2022-04-06 20:43:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:09,079 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1374 transitions. [2022-04-06 20:43:09,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1374 transitions. [2022-04-06 20:43:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:09,080 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:09,080 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:09,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-04-06 20:43:09,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:09,281 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:09,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2131618440, now seen corresponding path program 155 times [2022-04-06 20:43:09,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:09,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [962458630] [2022-04-06 20:43:09,282 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:09,282 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2131618440, now seen corresponding path program 156 times [2022-04-06 20:43:09,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:09,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670674557] [2022-04-06 20:43:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:09,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:09,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 20:43:09,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:09,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670674557] [2022-04-06 20:43:09,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670674557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:09,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201414950] [2022-04-06 20:43:09,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:09,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:09,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:09,531 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:09,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-04-06 20:43:10,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:43:10,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:10,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:43:10,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 20:43:11,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 20:43:11,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201414950] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:11,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:11,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:43:11,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:11,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [962458630] [2022-04-06 20:43:11,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [962458630] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:11,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:11,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:43:11,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643842785] [2022-04-06 20:43:11,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:11,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:43:11,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:43:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:43:11,638 INFO L87 Difference]: Start difference. First operand 1010 states and 1374 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:15,126 INFO L93 Difference]: Finished difference Result 1318 states and 1698 transitions. [2022-04-06 20:43:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:43:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:43:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:15,127 INFO L225 Difference]: With dead ends: 1318 [2022-04-06 20:43:15,127 INFO L226 Difference]: Without dead ends: 1292 [2022-04-06 20:43:15,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1033, Invalid=4223, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:43:15,128 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 78 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:15,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 161 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:43:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2022-04-06 20:43:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1010. [2022-04-06 20:43:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1005 states have (on average 1.3621890547263682) internal successors, (1369), 1005 states have internal predecessors, (1369), 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 20:43:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1373 transitions. [2022-04-06 20:43:15,808 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1373 transitions. Word has length 53 [2022-04-06 20:43:15,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:15,808 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1373 transitions. [2022-04-06 20:43:15,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:15,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1373 transitions. [2022-04-06 20:43:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:15,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:15,809 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:15,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-04-06 20:43:16,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:16,010 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:16,010 INFO L85 PathProgramCache]: Analyzing trace with hash 352464486, now seen corresponding path program 157 times [2022-04-06 20:43:16,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:16,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425054438] [2022-04-06 20:43:16,011 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:16,011 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:16,011 INFO L85 PathProgramCache]: Analyzing trace with hash 352464486, now seen corresponding path program 158 times [2022-04-06 20:43:16,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:16,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475521858] [2022-04-06 20:43:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:16,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:16,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:43:16,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:16,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475521858] [2022-04-06 20:43:16,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475521858] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:16,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704009806] [2022-04-06 20:43:16,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:16,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:16,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:16,262 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:16,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-04-06 20:43:16,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:16,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:16,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:43:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:43:16,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:43:16,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704009806] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:16,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:16,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:43:16,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:16,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425054438] [2022-04-06 20:43:16,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425054438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:16,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:16,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:43:16,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613499944] [2022-04-06 20:43:16,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:16,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:43:16,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:16,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:43:16,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:43:16,995 INFO L87 Difference]: Start difference. First operand 1010 states and 1373 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:20,604 INFO L93 Difference]: Finished difference Result 1352 states and 1732 transitions. [2022-04-06 20:43:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:43:20,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:43:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:20,605 INFO L225 Difference]: With dead ends: 1352 [2022-04-06 20:43:20,606 INFO L226 Difference]: Without dead ends: 1326 [2022-04-06 20:43:20,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=3844, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:43:20,606 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 87 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2583 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:20,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 172 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:43:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-04-06 20:43:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1010. [2022-04-06 20:43:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1005 states have (on average 1.3611940298507463) internal successors, (1368), 1005 states have internal predecessors, (1368), 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 20:43:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1372 transitions. [2022-04-06 20:43:21,285 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1372 transitions. Word has length 53 [2022-04-06 20:43:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:21,285 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1372 transitions. [2022-04-06 20:43:21,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1372 transitions. [2022-04-06 20:43:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:21,286 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:21,286 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:21,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-04-06 20:43:21,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:21,487 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash -952877128, now seen corresponding path program 159 times [2022-04-06 20:43:21,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:21,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [989663048] [2022-04-06 20:43:21,488 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:21,488 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash -952877128, now seen corresponding path program 160 times [2022-04-06 20:43:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122471548] [2022-04-06 20:43:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:21,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 20:43:21,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122471548] [2022-04-06 20:43:21,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122471548] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730592566] [2022-04-06 20:43:21,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:21,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:21,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:21,781 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:21,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-04-06 20:43:21,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:21,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:43:21,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 20:43:21,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 20:43:22,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730592566] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:22,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:22,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:43:22,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:22,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [989663048] [2022-04-06 20:43:22,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [989663048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:22,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:22,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:43:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187541110] [2022-04-06 20:43:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:22,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:43:22,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:43:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:43:22,520 INFO L87 Difference]: Start difference. First operand 1010 states and 1372 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:26,263 INFO L93 Difference]: Finished difference Result 1387 states and 1767 transitions. [2022-04-06 20:43:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:43:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:43:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:26,265 INFO L225 Difference]: With dead ends: 1387 [2022-04-06 20:43:26,265 INFO L226 Difference]: Without dead ends: 1361 [2022-04-06 20:43:26,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=974, Invalid=3582, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:43:26,265 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 102 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2833 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:26,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 181 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2833 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:43:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-04-06 20:43:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1010. [2022-04-06 20:43:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1005 states have (on average 1.3601990049751245) internal successors, (1367), 1005 states have internal predecessors, (1367), 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 20:43:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1371 transitions. [2022-04-06 20:43:26,950 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1371 transitions. Word has length 53 [2022-04-06 20:43:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:26,950 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1371 transitions. [2022-04-06 20:43:26,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1371 transitions. [2022-04-06 20:43:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:26,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:26,952 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:26,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:27,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:27,152 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1597850552, now seen corresponding path program 75 times [2022-04-06 20:43:27,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:27,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [300718954] [2022-04-06 20:43:27,153 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:27,153 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:27,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1597850552, now seen corresponding path program 76 times [2022-04-06 20:43:27,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:27,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949643633] [2022-04-06 20:43:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:27,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:27,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:27,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:27,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949643633] [2022-04-06 20:43:27,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949643633] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:27,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417233755] [2022-04-06 20:43:27,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:27,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:27,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:27,845 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:27,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-04-06 20:43:27,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:27,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:27,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:43:27,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:28,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:29,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417233755] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:29,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:29,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 20:43:29,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [300718954] [2022-04-06 20:43:29,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [300718954] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:29,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:29,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:43:29,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483856684] [2022-04-06 20:43:29,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:29,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:43:29,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:43:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1688, Invalid=5284, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:43:29,991 INFO L87 Difference]: Start difference. First operand 1010 states and 1371 transitions. Second operand has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 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 20:43:37,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:37,430 INFO L93 Difference]: Finished difference Result 1740 states and 2676 transitions. [2022-04-06 20:43:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:43:37,430 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 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 20:43:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:37,432 INFO L225 Difference]: With dead ends: 1740 [2022-04-06 20:43:37,432 INFO L226 Difference]: Without dead ends: 1698 [2022-04-06 20:43:37,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3410, Invalid=11842, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:43:37,433 INFO L913 BasicCegarLoop]: 173 mSDtfsCounter, 286 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 12478 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 12686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 12478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:37,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 375 Invalid, 12686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 12478 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-06 20:43:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2022-04-06 20:43:38,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1039. [2022-04-06 20:43:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1034 states have (on average 1.3636363636363635) internal successors, (1410), 1034 states have internal predecessors, (1410), 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 20:43:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1414 transitions. [2022-04-06 20:43:38,122 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1414 transitions. Word has length 53 [2022-04-06 20:43:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:38,122 INFO L478 AbstractCegarLoop]: Abstraction has 1039 states and 1414 transitions. [2022-04-06 20:43:38,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 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 20:43:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1414 transitions. [2022-04-06 20:43:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:43:38,123 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:38,123 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:38,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-04-06 20:43:38,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-04-06 20:43:38,324 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash 780242864, now seen corresponding path program 49 times [2022-04-06 20:43:38,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:38,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2023288737] [2022-04-06 20:43:38,325 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:38,325 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash 780242864, now seen corresponding path program 50 times [2022-04-06 20:43:38,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:38,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823741653] [2022-04-06 20:43:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:38,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:38,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:43:38,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823741653] [2022-04-06 20:43:38,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823741653] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706421945] [2022-04-06 20:43:38,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:38,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:38,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:38,745 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:38,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-04-06 20:43:38,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:38,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:43:38,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:43:39,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:43:40,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706421945] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:40,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:40,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20, 20] total 63 [2022-04-06 20:43:40,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:40,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2023288737] [2022-04-06 20:43:40,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2023288737] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:40,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:40,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:43:40,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924962756] [2022-04-06 20:43:40,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:40,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:43:40,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:40,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:43:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=3398, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:43:40,101 INFO L87 Difference]: Start difference. First operand 1039 states and 1414 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:42,543 INFO L93 Difference]: Finished difference Result 1137 states and 1565 transitions. [2022-04-06 20:43:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:43:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:43:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:42,544 INFO L225 Difference]: With dead ends: 1137 [2022-04-06 20:43:42,544 INFO L226 Difference]: Without dead ends: 1132 [2022-04-06 20:43:42,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 64 SyntacticMatches, 12 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1119, Invalid=6713, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:43:42,545 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 195 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:42,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 66 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:43:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-04-06 20:43:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1107. [2022-04-06 20:43:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1102 states have (on average 1.366606170598911) internal successors, (1506), 1102 states have internal predecessors, (1506), 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 20:43:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1510 transitions. [2022-04-06 20:43:43,297 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1510 transitions. Word has length 54 [2022-04-06 20:43:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:43,297 INFO L478 AbstractCegarLoop]: Abstraction has 1107 states and 1510 transitions. [2022-04-06 20:43:43,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1510 transitions. [2022-04-06 20:43:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:43:43,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:43,298 INFO L499 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:43,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-04-06 20:43:43,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-04-06 20:43:43,511 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:43,511 INFO L85 PathProgramCache]: Analyzing trace with hash -969535487, now seen corresponding path program 77 times [2022-04-06 20:43:43,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:43,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1644926061] [2022-04-06 20:43:43,512 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:43,512 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash -969535487, now seen corresponding path program 78 times [2022-04-06 20:43:43,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:43,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670043057] [2022-04-06 20:43:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:43,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:44,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:44,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:44,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670043057] [2022-04-06 20:43:44,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670043057] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:44,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095459381] [2022-04-06 20:43:44,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:44,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:44,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:44,227 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:44,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-04-06 20:43:48,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-04-06 20:43:48,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:48,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 20:43:48,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:48,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:50,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095459381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:50,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:50,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 20:43:50,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:50,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1644926061] [2022-04-06 20:43:50,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1644926061] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:50,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:50,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:43:50,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311266433] [2022-04-06 20:43:50,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:50,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:43:50,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:50,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:43:50,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1771, Invalid=5539, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:43:50,830 INFO L87 Difference]: Start difference. First operand 1107 states and 1510 transitions. Second operand has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:58,957 INFO L93 Difference]: Finished difference Result 1908 states and 2942 transitions. [2022-04-06 20:43:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:43:58,958 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:43:58,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:58,960 INFO L225 Difference]: With dead ends: 1908 [2022-04-06 20:43:58,960 INFO L226 Difference]: Without dead ends: 1864 [2022-04-06 20:43:58,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3577, Invalid=12425, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:43:58,960 INFO L913 BasicCegarLoop]: 178 mSDtfsCounter, 303 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 13157 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 13379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 13157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:58,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 385 Invalid, 13379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 13157 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:43:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-04-06 20:43:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1138. [2022-04-06 20:43:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1133 states have (on average 1.3698146513680494) internal successors, (1552), 1133 states have internal predecessors, (1552), 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 20:43:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1556 transitions. [2022-04-06 20:43:59,738 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1556 transitions. Word has length 54 [2022-04-06 20:43:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:59,738 INFO L478 AbstractCegarLoop]: Abstraction has 1138 states and 1556 transitions. [2022-04-06 20:43:59,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1556 transitions. [2022-04-06 20:43:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:43:59,739 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:59,739 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:59,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:59,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-04-06 20:43:59,940 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1883429800, now seen corresponding path program 161 times [2022-04-06 20:43:59,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:59,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1932569356] [2022-04-06 20:43:59,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:59,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1883429800, now seen corresponding path program 162 times [2022-04-06 20:43:59,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:59,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077941133] [2022-04-06 20:43:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:59,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:00,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:44:00,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:00,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077941133] [2022-04-06 20:44:00,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077941133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:00,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824201444] [2022-04-06 20:44:00,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:00,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:00,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:00,965 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:00,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-04-06 20:44:02,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:44:02,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:02,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 131 conjunts are in the unsatisfiable core [2022-04-06 20:44:02,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:20,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:38,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824201444] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:38,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:38,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 46, 35] total 100 [2022-04-06 20:44:38,321 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:38,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1932569356] [2022-04-06 20:44:38,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1932569356] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:38,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:38,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:44:38,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903392681] [2022-04-06 20:44:38,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:38,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:44:38,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:38,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:44:38,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1327, Invalid=8570, Unknown=3, NotChecked=0, Total=9900 [2022-04-06 20:44:38,322 INFO L87 Difference]: Start difference. First operand 1138 states and 1556 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 27 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 20:44:43,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 20:44:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:50,408 INFO L93 Difference]: Finished difference Result 1165 states and 1583 transitions. [2022-04-06 20:44:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:44:50,408 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 27 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 55 [2022-04-06 20:44:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:50,409 INFO L225 Difference]: With dead ends: 1165 [2022-04-06 20:44:50,409 INFO L226 Difference]: Without dead ends: 1160 [2022-04-06 20:44:50,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4105 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=1645, Invalid=14101, Unknown=4, NotChecked=0, Total=15750 [2022-04-06 20:44:50,410 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:50,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 133 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1043 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:44:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-04-06 20:44:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1138. [2022-04-06 20:44:51,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1133 states have (on average 1.3698146513680494) internal successors, (1552), 1133 states have internal predecessors, (1552), 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 20:44:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1556 transitions. [2022-04-06 20:44:51,248 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1556 transitions. Word has length 55 [2022-04-06 20:44:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:51,248 INFO L478 AbstractCegarLoop]: Abstraction has 1138 states and 1556 transitions. [2022-04-06 20:44:51,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 27 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 20:44:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1556 transitions. [2022-04-06 20:44:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:44:51,249 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:51,249 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:51,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-04-06 20:44:51,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:51,450 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:51,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1159922696, now seen corresponding path program 163 times [2022-04-06 20:44:51,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:51,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [630592970] [2022-04-06 20:44:51,451 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:51,451 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1159922696, now seen corresponding path program 164 times [2022-04-06 20:44:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:51,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867969701] [2022-04-06 20:44:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:51,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:51,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-06 20:44:51,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:51,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867969701] [2022-04-06 20:44:51,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867969701] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:51,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875726560] [2022-04-06 20:44:51,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:51,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:51,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:51,726 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:51,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-04-06 20:44:51,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:51,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:51,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:44:51,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-06 20:44:51,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-06 20:44:52,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875726560] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:52,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:52,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:44:52,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:52,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [630592970] [2022-04-06 20:44:52,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [630592970] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:52,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:52,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:44:52,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000015186] [2022-04-06 20:44:52,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:52,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:44:52,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:44:52,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1899, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:44:52,492 INFO L87 Difference]: Start difference. First operand 1138 states and 1556 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:44:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:56,160 INFO L93 Difference]: Finished difference Result 1356 states and 1787 transitions. [2022-04-06 20:44:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:44:56,160 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 55 [2022-04-06 20:44:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:56,161 INFO L225 Difference]: With dead ends: 1356 [2022-04-06 20:44:56,161 INFO L226 Difference]: Without dead ends: 1329 [2022-04-06 20:44:56,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1361, Invalid=6295, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:44:56,162 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 54 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1907 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:56,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 132 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1907 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:44:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2022-04-06 20:44:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1138. [2022-04-06 20:44:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1133 states have (on average 1.3689320388349515) internal successors, (1551), 1133 states have internal predecessors, (1551), 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 20:44:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1555 transitions. [2022-04-06 20:44:56,985 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1555 transitions. Word has length 55 [2022-04-06 20:44:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:56,985 INFO L478 AbstractCegarLoop]: Abstraction has 1138 states and 1555 transitions. [2022-04-06 20:44:56,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:44:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1555 transitions. [2022-04-06 20:44:56,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:44:56,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:56,986 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:57,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-04-06 20:44:57,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:57,197 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:57,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1297497958, now seen corresponding path program 51 times [2022-04-06 20:44:57,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:57,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26723803] [2022-04-06 20:44:57,198 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:57,198 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1297497958, now seen corresponding path program 52 times [2022-04-06 20:44:57,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:57,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207952069] [2022-04-06 20:44:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:57,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:57,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:44:57,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:57,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207952069] [2022-04-06 20:44:57,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207952069] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:57,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570383342] [2022-04-06 20:44:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:57,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:57,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:57,581 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:57,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-04-06 20:44:57,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:57,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:57,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 20:44:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:44:58,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:44:59,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570383342] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:59,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:59,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 73 [2022-04-06 20:44:59,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:59,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26723803] [2022-04-06 20:44:59,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26723803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:59,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:59,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:44:59,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294334452] [2022-04-06 20:44:59,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:59,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:44:59,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:44:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=4497, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:44:59,194 INFO L87 Difference]: Start difference. First operand 1138 states and 1555 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 20:45:05,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:05,425 INFO L93 Difference]: Finished difference Result 1373 states and 1803 transitions. [2022-04-06 20:45:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-04-06 20:45:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 55 [2022-04-06 20:45:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:05,426 INFO L225 Difference]: With dead ends: 1373 [2022-04-06 20:45:05,426 INFO L226 Difference]: Without dead ends: 1260 [2022-04-06 20:45:05,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13215 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5245, Invalid=41627, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 20:45:05,428 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 73 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5485 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 5777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 5485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:05,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 175 Invalid, 5777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 5485 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:45:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-04-06 20:45:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1137. [2022-04-06 20:45:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1132 states have (on average 1.3630742049469964) internal successors, (1543), 1132 states have internal predecessors, (1543), 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 20:45:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1547 transitions. [2022-04-06 20:45:06,280 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1547 transitions. Word has length 55 [2022-04-06 20:45:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:06,280 INFO L478 AbstractCegarLoop]: Abstraction has 1137 states and 1547 transitions. [2022-04-06 20:45:06,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 20:45:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1547 transitions. [2022-04-06 20:45:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:06,281 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:06,281 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:06,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-04-06 20:45:06,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-04-06 20:45:06,481 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash 393197656, now seen corresponding path program 165 times [2022-04-06 20:45:06,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:06,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822209434] [2022-04-06 20:45:06,482 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:06,482 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash 393197656, now seen corresponding path program 166 times [2022-04-06 20:45:06,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:06,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540659422] [2022-04-06 20:45:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:06,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:06,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:45:06,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:06,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540659422] [2022-04-06 20:45:06,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540659422] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:06,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994993381] [2022-04-06 20:45:06,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:06,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:06,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:06,762 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:06,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-04-06 20:45:06,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:06,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:06,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:45:06,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:45:06,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:45:07,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994993381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:07,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:07,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:45:07,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:07,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822209434] [2022-04-06 20:45:07,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822209434] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:07,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:07,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:45:07,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576508502] [2022-04-06 20:45:07,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:07,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:45:07,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:45:07,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1882, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:45:07,520 INFO L87 Difference]: Start difference. First operand 1137 states and 1547 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:11,421 INFO L93 Difference]: Finished difference Result 1387 states and 1811 transitions. [2022-04-06 20:45:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:45:11,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 55 [2022-04-06 20:45:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:11,422 INFO L225 Difference]: With dead ends: 1387 [2022-04-06 20:45:11,422 INFO L226 Difference]: Without dead ends: 1360 [2022-04-06 20:45:11,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1392, Invalid=6264, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:45:11,423 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 62 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:11,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 138 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:45:11,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2022-04-06 20:45:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1137. [2022-04-06 20:45:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1132 states have (on average 1.362190812720848) internal successors, (1542), 1132 states have internal predecessors, (1542), 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 20:45:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1546 transitions. [2022-04-06 20:45:12,261 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1546 transitions. Word has length 55 [2022-04-06 20:45:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:12,261 INFO L478 AbstractCegarLoop]: Abstraction has 1137 states and 1546 transitions. [2022-04-06 20:45:12,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1546 transitions. [2022-04-06 20:45:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:12,262 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:12,262 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:12,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:12,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:12,463 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1986840056, now seen corresponding path program 167 times [2022-04-06 20:45:12,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:12,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [627259271] [2022-04-06 20:45:12,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:12,464 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1986840056, now seen corresponding path program 168 times [2022-04-06 20:45:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:12,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352768669] [2022-04-06 20:45:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:12,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 20:45:12,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:12,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352768669] [2022-04-06 20:45:12,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352768669] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:12,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973682186] [2022-04-06 20:45:12,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:12,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:12,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:12,738 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:12,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-04-06 20:45:13,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:45:13,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:13,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:45:13,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 20:45:13,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 20:45:14,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973682186] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:14,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:14,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:45:14,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:14,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [627259271] [2022-04-06 20:45:14,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [627259271] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:14,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:14,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:45:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446973289] [2022-04-06 20:45:14,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:14,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:45:14,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:14,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:45:14,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:45:14,569 INFO L87 Difference]: Start difference. First operand 1137 states and 1546 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:18,684 INFO L93 Difference]: Finished difference Result 1420 states and 1844 transitions. [2022-04-06 20:45:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:45:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 55 [2022-04-06 20:45:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:18,686 INFO L225 Difference]: With dead ends: 1420 [2022-04-06 20:45:18,686 INFO L226 Difference]: Without dead ends: 1393 [2022-04-06 20:45:18,687 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1323, Invalid=5817, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:45:18,687 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 70 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:18,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 162 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:45:18,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-04-06 20:45:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1137. [2022-04-06 20:45:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1132 states have (on average 1.3613074204946995) internal successors, (1541), 1132 states have internal predecessors, (1541), 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 20:45:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1545 transitions. [2022-04-06 20:45:19,525 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1545 transitions. Word has length 55 [2022-04-06 20:45:19,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:19,525 INFO L478 AbstractCegarLoop]: Abstraction has 1137 states and 1545 transitions. [2022-04-06 20:45:19,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1545 transitions. [2022-04-06 20:45:19,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:19,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:19,526 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:19,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-04-06 20:45:19,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:19,727 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:19,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:19,727 INFO L85 PathProgramCache]: Analyzing trace with hash 153141848, now seen corresponding path program 169 times [2022-04-06 20:45:19,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:19,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1466748966] [2022-04-06 20:45:19,728 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:19,728 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:19,728 INFO L85 PathProgramCache]: Analyzing trace with hash 153141848, now seen corresponding path program 170 times [2022-04-06 20:45:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:19,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845993303] [2022-04-06 20:45:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:19,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:19,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-04-06 20:45:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:19,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845993303] [2022-04-06 20:45:19,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845993303] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:19,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468441400] [2022-04-06 20:45:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:19,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:19,999 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:19,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-04-06 20:45:20,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:20,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:45:20,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-04-06 20:45:20,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-04-06 20:45:20,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468441400] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:20,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:20,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:45:20,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:20,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1466748966] [2022-04-06 20:45:20,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1466748966] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:20,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:20,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:45:20,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519824486] [2022-04-06 20:45:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:20,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:45:20,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:20,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:45:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1844, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:45:20,784 INFO L87 Difference]: Start difference. First operand 1137 states and 1545 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:24,896 INFO L93 Difference]: Finished difference Result 1454 states and 1878 transitions. [2022-04-06 20:45:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:45:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 55 [2022-04-06 20:45:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:24,898 INFO L225 Difference]: With dead ends: 1454 [2022-04-06 20:45:24,898 INFO L226 Difference]: Without dead ends: 1427 [2022-04-06 20:45:24,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1204, Invalid=5116, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:45:24,899 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 79 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:24,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 153 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:45:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-04-06 20:45:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1137. [2022-04-06 20:45:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1132 states have (on average 1.3604240282685511) internal successors, (1540), 1132 states have internal predecessors, (1540), 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 20:45:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1544 transitions. [2022-04-06 20:45:25,719 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1544 transitions. Word has length 55 [2022-04-06 20:45:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:25,719 INFO L478 AbstractCegarLoop]: Abstraction has 1137 states and 1544 transitions. [2022-04-06 20:45:25,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1544 transitions. [2022-04-06 20:45:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:25,720 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:25,720 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:25,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:25,921 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:25,921 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2023288840, now seen corresponding path program 171 times [2022-04-06 20:45:25,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:25,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1058641999] [2022-04-06 20:45:25,922 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:25,922 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2023288840, now seen corresponding path program 172 times [2022-04-06 20:45:25,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:25,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142049169] [2022-04-06 20:45:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:25,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:26,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-04-06 20:45:26,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:26,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142049169] [2022-04-06 20:45:26,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142049169] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:26,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323827669] [2022-04-06 20:45:26,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:26,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:26,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:26,216 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:26,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-04-06 20:45:26,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:26,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:26,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:45:26,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-04-06 20:45:26,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-04-06 20:45:27,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323827669] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:27,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:27,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:45:27,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:27,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1058641999] [2022-04-06 20:45:27,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1058641999] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:27,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:27,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:45:27,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379967149] [2022-04-06 20:45:27,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:27,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:45:27,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:45:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1819, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:45:27,016 INFO L87 Difference]: Start difference. First operand 1137 states and 1544 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:31,342 INFO L93 Difference]: Finished difference Result 1489 states and 1913 transitions. [2022-04-06 20:45:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:45:31,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 55 [2022-04-06 20:45:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:31,343 INFO L225 Difference]: With dead ends: 1489 [2022-04-06 20:45:31,343 INFO L226 Difference]: Without dead ends: 1462 [2022-04-06 20:45:31,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1121, Invalid=4579, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:45:31,344 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 87 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:31,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 174 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:45:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-04-06 20:45:32,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1137. [2022-04-06 20:45:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1132 states have (on average 1.3595406360424027) internal successors, (1539), 1132 states have internal predecessors, (1539), 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 20:45:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1543 transitions. [2022-04-06 20:45:32,169 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1543 transitions. Word has length 55 [2022-04-06 20:45:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:32,170 INFO L478 AbstractCegarLoop]: Abstraction has 1137 states and 1543 transitions. [2022-04-06 20:45:32,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1543 transitions. [2022-04-06 20:45:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:32,171 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:32,171 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:32,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-04-06 20:45:32,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:32,371 INFO L403 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:32,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:32,371 INFO L85 PathProgramCache]: Analyzing trace with hash -410235816, now seen corresponding path program 173 times [2022-04-06 20:45:32,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:32,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113686512] [2022-04-06 20:45:32,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:32,372 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:32,372 INFO L85 PathProgramCache]: Analyzing trace with hash -410235816, now seen corresponding path program 174 times [2022-04-06 20:45:32,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:32,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047495581] [2022-04-06 20:45:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:32,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:32,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-04-06 20:45:32,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:32,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047495581] [2022-04-06 20:45:32,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047495581] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:32,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216409301] [2022-04-06 20:45:32,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:32,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:32,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:32,642 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:32,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-04-06 20:45:33,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:33,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:33,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:45:33,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-04-06 20:45:33,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-04-06 20:45:33,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216409301] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:33,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:33,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8, 8] total 34 [2022-04-06 20:45:33,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:33,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113686512] [2022-04-06 20:45:33,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113686512] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:33,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:33,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:45:33,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308116289] [2022-04-06 20:45:33,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:33,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:45:33,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:33,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:45:33,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:45:33,339 INFO L87 Difference]: Start difference. First operand 1137 states and 1543 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:37,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:37,825 INFO L93 Difference]: Finished difference Result 1525 states and 1949 transitions. [2022-04-06 20:45:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:45:37,825 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 55 [2022-04-06 20:45:37,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:37,826 INFO L225 Difference]: With dead ends: 1525 [2022-04-06 20:45:37,827 INFO L226 Difference]: Without dead ends: 1498 [2022-04-06 20:45:37,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=3189, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:45:37,827 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 96 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:37,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 185 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2991 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:45:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-04-06 20:45:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1137. [2022-04-06 20:45:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1132 states have (on average 1.3586572438162545) internal successors, (1538), 1132 states have internal predecessors, (1538), 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 20:45:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1542 transitions. [2022-04-06 20:45:38,683 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1542 transitions. Word has length 55 [2022-04-06 20:45:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:38,683 INFO L478 AbstractCegarLoop]: Abstraction has 1137 states and 1542 transitions. [2022-04-06 20:45:38,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1542 transitions. [2022-04-06 20:45:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:38,684 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:38,684 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:38,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-04-06 20:45:38,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:38,885 INFO L403 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1181473272, now seen corresponding path program 175 times [2022-04-06 20:45:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:38,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637034359] [2022-04-06 20:45:38,886 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:38,886 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1181473272, now seen corresponding path program 176 times [2022-04-06 20:45:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:38,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509254192] [2022-04-06 20:45:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:39,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-04-06 20:45:39,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509254192] [2022-04-06 20:45:39,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509254192] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:39,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567956213] [2022-04-06 20:45:39,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:39,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:39,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:39,155 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:39,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-04-06 20:45:39,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:39,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:39,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:45:39,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-04-06 20:45:39,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-04-06 20:45:39,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567956213] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:39,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:39,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:45:39,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:39,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637034359] [2022-04-06 20:45:39,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637034359] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:39,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:39,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:45:39,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077649283] [2022-04-06 20:45:39,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:39,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:45:39,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:45:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=1757, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:45:39,976 INFO L87 Difference]: Start difference. First operand 1137 states and 1542 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:44,524 INFO L93 Difference]: Finished difference Result 1562 states and 1986 transitions. [2022-04-06 20:45:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:45:44,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 55 [2022-04-06 20:45:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:44,526 INFO L225 Difference]: With dead ends: 1562 [2022-04-06 20:45:44,526 INFO L226 Difference]: Without dead ends: 1535 [2022-04-06 20:45:44,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1063, Invalid=3907, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:45:44,526 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 110 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3164 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:44,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 191 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3164 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:45:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-04-06 20:45:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1137. [2022-04-06 20:45:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1132 states have (on average 1.357773851590106) internal successors, (1537), 1132 states have internal predecessors, (1537), 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 20:45:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1541 transitions. [2022-04-06 20:45:45,364 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1541 transitions. Word has length 55 [2022-04-06 20:45:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:45,364 INFO L478 AbstractCegarLoop]: Abstraction has 1137 states and 1541 transitions. [2022-04-06 20:45:45,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 20:45:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1541 transitions. [2022-04-06 20:45:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:45,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:45,365 INFO L499 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:45,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:45,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-04-06 20:45:45,565 INFO L403 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:45,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1045875928, now seen corresponding path program 79 times [2022-04-06 20:45:45,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:45,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [267370105] [2022-04-06 20:45:45,566 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:45,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:45,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1045875928, now seen corresponding path program 80 times [2022-04-06 20:45:45,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:45,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832131469] [2022-04-06 20:45:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:46,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:46,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:46,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832131469] [2022-04-06 20:45:46,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832131469] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:46,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17878222] [2022-04-06 20:45:46,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:46,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:46,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:46,305 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:46,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-04-06 20:45:46,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 20:45:46,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:46,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:48,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17878222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:48,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:48,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-04-06 20:45:48,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:48,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [267370105] [2022-04-06 20:45:48,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [267370105] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:48,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:48,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:45:48,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742878796] [2022-04-06 20:45:48,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:48,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:45:48,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:48,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:45:48,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1856, Invalid=5800, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:45:48,686 INFO L87 Difference]: Start difference. First operand 1137 states and 1541 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 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 20:45:57,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:57,473 INFO L93 Difference]: Finished difference Result 1954 states and 3004 transitions. [2022-04-06 20:45:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:45:57,474 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 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 20:45:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:57,475 INFO L225 Difference]: With dead ends: 1954 [2022-04-06 20:45:57,475 INFO L226 Difference]: Without dead ends: 1910 [2022-04-06 20:45:57,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3748, Invalid=13022, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:45:57,476 INFO L913 BasicCegarLoop]: 183 mSDtfsCounter, 304 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 13856 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 14076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 13856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:57,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 395 Invalid, 14076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 13856 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 20:45:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-04-06 20:45:58,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1168. [2022-04-06 20:45:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1163 states have (on average 1.361134995700774) internal successors, (1583), 1163 states have internal predecessors, (1583), 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 20:45:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1587 transitions. [2022-04-06 20:45:58,317 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1587 transitions. Word has length 55 [2022-04-06 20:45:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:58,317 INFO L478 AbstractCegarLoop]: Abstraction has 1168 states and 1587 transitions. [2022-04-06 20:45:58,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 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 20:45:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1587 transitions. [2022-04-06 20:45:58,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:45:58,319 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:58,319 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:58,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:58,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:58,531 INFO L403 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:58,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1777713440, now seen corresponding path program 177 times [2022-04-06 20:45:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:58,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1532769274] [2022-04-06 20:45:58,532 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:58,532 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1777713440, now seen corresponding path program 178 times [2022-04-06 20:45:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:58,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687127747] [2022-04-06 20:45:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:58,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:58,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:58,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:58,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687127747] [2022-04-06 20:45:58,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687127747] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:58,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910997786] [2022-04-06 20:45:58,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:58,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:58,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:58,696 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:58,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-04-06 20:45:58,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:45:58,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:58,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:58,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910997786] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:58,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:58,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-04-06 20:45:58,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:58,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1532769274] [2022-04-06 20:45:58,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1532769274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:58,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:58,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:45:58,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527594962] [2022-04-06 20:45:58,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:58,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:45:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:58,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:45:58,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:45:58,916 INFO L87 Difference]: Start difference. First operand 1168 states and 1587 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:00,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:00,668 INFO L93 Difference]: Finished difference Result 1207 states and 1627 transitions. [2022-04-06 20:46:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:46:00,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:46:00,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:00,670 INFO L225 Difference]: With dead ends: 1207 [2022-04-06 20:46:00,670 INFO L226 Difference]: Without dead ends: 1167 [2022-04-06 20:46:00,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:46:00,670 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 62 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:00,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 103 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:46:00,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-04-06 20:46:01,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1157. [2022-04-06 20:46:01,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1152 states have (on average 1.3637152777777777) internal successors, (1571), 1152 states have internal predecessors, (1571), 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 20:46:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1575 transitions. [2022-04-06 20:46:01,580 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1575 transitions. Word has length 56 [2022-04-06 20:46:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:01,580 INFO L478 AbstractCegarLoop]: Abstraction has 1157 states and 1575 transitions. [2022-04-06 20:46:01,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:01,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1575 transitions. [2022-04-06 20:46:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:46:01,581 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:01,581 INFO L499 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:01,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-04-06 20:46:01,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-04-06 20:46:01,781 INFO L403 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:01,782 INFO L85 PathProgramCache]: Analyzing trace with hash -900879647, now seen corresponding path program 81 times [2022-04-06 20:46:01,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:01,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [456748947] [2022-04-06 20:46:01,782 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:01,782 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:01,782 INFO L85 PathProgramCache]: Analyzing trace with hash -900879647, now seen corresponding path program 82 times [2022-04-06 20:46:01,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:01,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796112449] [2022-04-06 20:46:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:01,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:02,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:02,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:02,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796112449] [2022-04-06 20:46:02,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796112449] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:02,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826677282] [2022-04-06 20:46:02,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:02,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:02,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:02,567 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:02,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-04-06 20:46:02,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:02,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:02,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 20:46:02,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:02,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:05,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826677282] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:05,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:05,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 20:46:05,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:05,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [456748947] [2022-04-06 20:46:05,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [456748947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:05,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:05,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:46:05,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292510981] [2022-04-06 20:46:05,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:05,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:46:05,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:46:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1943, Invalid=6067, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:46:05,038 INFO L87 Difference]: Start difference. First operand 1157 states and 1575 transitions. Second operand has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:14,314 INFO L93 Difference]: Finished difference Result 1992 states and 3071 transitions. [2022-04-06 20:46:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:46:14,315 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:46:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:14,317 INFO L225 Difference]: With dead ends: 1992 [2022-04-06 20:46:14,317 INFO L226 Difference]: Without dead ends: 1947 [2022-04-06 20:46:14,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3923, Invalid=13633, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:46:14,323 INFO L913 BasicCegarLoop]: 185 mSDtfsCounter, 312 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 14402 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 14632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 14402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:14,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 402 Invalid, 14632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 14402 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 20:46:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-04-06 20:46:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1188. [2022-04-06 20:46:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1183 states have (on average 1.3668639053254439) internal successors, (1617), 1183 states have internal predecessors, (1617), 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 20:46:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1621 transitions. [2022-04-06 20:46:15,243 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1621 transitions. Word has length 56 [2022-04-06 20:46:15,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:15,243 INFO L478 AbstractCegarLoop]: Abstraction has 1188 states and 1621 transitions. [2022-04-06 20:46:15,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:15,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1621 transitions. [2022-04-06 20:46:15,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:46:15,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:15,244 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:15,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-04-06 20:46:15,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-04-06 20:46:15,445 INFO L403 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:15,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:15,445 INFO L85 PathProgramCache]: Analyzing trace with hash -79365832, now seen corresponding path program 179 times [2022-04-06 20:46:15,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:15,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1771320467] [2022-04-06 20:46:15,446 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:15,446 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:15,446 INFO L85 PathProgramCache]: Analyzing trace with hash -79365832, now seen corresponding path program 180 times [2022-04-06 20:46:15,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:15,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409715719] [2022-04-06 20:46:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:15,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:15,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-04-06 20:46:15,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:15,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409715719] [2022-04-06 20:46:15,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409715719] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:15,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687626358] [2022-04-06 20:46:15,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:15,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:15,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:15,736 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:15,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-04-06 20:46:16,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:46:16,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:46:16,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-04-06 20:46:16,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-04-06 20:46:17,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687626358] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:17,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:17,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:46:17,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:17,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1771320467] [2022-04-06 20:46:17,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1771320467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:17,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:17,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:46:17,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005444346] [2022-04-06 20:46:17,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:17,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:46:17,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:46:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2058, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:46:17,291 INFO L87 Difference]: Start difference. First operand 1188 states and 1621 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:21,385 INFO L93 Difference]: Finished difference Result 1417 states and 1864 transitions. [2022-04-06 20:46:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:46:21,386 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:46:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:21,387 INFO L225 Difference]: With dead ends: 1417 [2022-04-06 20:46:21,387 INFO L226 Difference]: Without dead ends: 1389 [2022-04-06 20:46:21,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1463, Invalid=6727, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:46:21,388 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 54 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:21,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 161 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:46:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-04-06 20:46:22,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1188. [2022-04-06 20:46:22,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1183 states have (on average 1.3660185967878276) internal successors, (1616), 1183 states have internal predecessors, (1616), 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 20:46:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1620 transitions. [2022-04-06 20:46:22,301 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1620 transitions. Word has length 57 [2022-04-06 20:46:22,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:22,301 INFO L478 AbstractCegarLoop]: Abstraction has 1188 states and 1620 transitions. [2022-04-06 20:46:22,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1620 transitions. [2022-04-06 20:46:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:46:22,302 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:22,302 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:22,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:22,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-04-06 20:46:22,502 INFO L403 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:22,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1509793448, now seen corresponding path program 53 times [2022-04-06 20:46:22,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:22,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [135389922] [2022-04-06 20:46:22,503 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:22,503 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:22,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1509793448, now seen corresponding path program 54 times [2022-04-06 20:46:22,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:22,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467834762] [2022-04-06 20:46:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:22,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:22,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:46:22,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:22,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467834762] [2022-04-06 20:46:22,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467834762] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:22,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4144653] [2022-04-06 20:46:22,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:22,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:22,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:22,991 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:22,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-04-06 20:46:23,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:46:23,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:23,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:46:23,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:46:24,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:46:24,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4144653] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:24,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:24,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17, 17] total 60 [2022-04-06 20:46:24,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [135389922] [2022-04-06 20:46:24,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [135389922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:24,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:24,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:46:24,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786261295] [2022-04-06 20:46:24,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:24,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:46:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:46:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1006, Invalid=2534, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:46:24,879 INFO L87 Difference]: Start difference. First operand 1188 states and 1620 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:27,572 INFO L93 Difference]: Finished difference Result 1293 states and 1782 transitions. [2022-04-06 20:46:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:46:27,573 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:46:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:27,574 INFO L225 Difference]: With dead ends: 1293 [2022-04-06 20:46:27,574 INFO L226 Difference]: Without dead ends: 1288 [2022-04-06 20:46:27,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1665, Invalid=5991, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:46:27,574 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 183 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:27,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 89 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:46:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2022-04-06 20:46:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1261. [2022-04-06 20:46:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1256 states have (on average 1.3686305732484076) internal successors, (1719), 1256 states have internal predecessors, (1719), 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 20:46:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1723 transitions. [2022-04-06 20:46:28,562 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1723 transitions. Word has length 57 [2022-04-06 20:46:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:28,562 INFO L478 AbstractCegarLoop]: Abstraction has 1261 states and 1723 transitions. [2022-04-06 20:46:28,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1723 transitions. [2022-04-06 20:46:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:46:28,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:28,563 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:28,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:28,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:28,764 INFO L403 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1148925798, now seen corresponding path program 181 times [2022-04-06 20:46:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:28,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1802635263] [2022-04-06 20:46:28,765 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:28,765 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1148925798, now seen corresponding path program 182 times [2022-04-06 20:46:28,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:28,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756426476] [2022-04-06 20:46:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:28,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:29,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-04-06 20:46:29,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:29,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756426476] [2022-04-06 20:46:29,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756426476] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:29,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875568854] [2022-04-06 20:46:29,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:29,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:29,057 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:29,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-04-06 20:46:29,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:29,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:29,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:46:29,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-04-06 20:46:29,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-04-06 20:46:29,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875568854] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:29,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:29,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:46:29,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:29,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1802635263] [2022-04-06 20:46:29,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1802635263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:29,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:29,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:46:29,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645432314] [2022-04-06 20:46:29,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:29,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:46:29,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:29,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:46:29,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:46:29,877 INFO L87 Difference]: Start difference. First operand 1261 states and 1723 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:34,553 INFO L93 Difference]: Finished difference Result 1553 states and 2030 transitions. [2022-04-06 20:46:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:46:34,553 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:46:34,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:34,554 INFO L225 Difference]: With dead ends: 1553 [2022-04-06 20:46:34,554 INFO L226 Difference]: Without dead ends: 1525 [2022-04-06 20:46:34,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1487, Invalid=6703, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:46:34,555 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 62 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:34,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 142 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:46:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-04-06 20:46:35,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1261. [2022-04-06 20:46:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1256 states have (on average 1.3678343949044587) internal successors, (1718), 1256 states have internal predecessors, (1718), 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 20:46:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1722 transitions. [2022-04-06 20:46:35,533 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1722 transitions. Word has length 57 [2022-04-06 20:46:35,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:35,533 INFO L478 AbstractCegarLoop]: Abstraction has 1261 states and 1722 transitions. [2022-04-06 20:46:35,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1722 transitions. [2022-04-06 20:46:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:46:35,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:35,534 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:35,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:35,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:35,737 INFO L403 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:35,737 INFO L85 PathProgramCache]: Analyzing trace with hash 495811448, now seen corresponding path program 183 times [2022-04-06 20:46:35,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:35,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [588804108] [2022-04-06 20:46:35,738 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:35,738 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:35,738 INFO L85 PathProgramCache]: Analyzing trace with hash 495811448, now seen corresponding path program 184 times [2022-04-06 20:46:35,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:35,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286654477] [2022-04-06 20:46:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:35,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 20:46:36,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:36,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286654477] [2022-04-06 20:46:36,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286654477] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:36,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561770439] [2022-04-06 20:46:36,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:36,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:36,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:36,030 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:36,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-04-06 20:46:36,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:36,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:46:36,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 20:46:36,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 20:46:36,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561770439] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:36,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:36,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:46:36,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [588804108] [2022-04-06 20:46:36,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [588804108] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:36,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:36,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:46:36,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771988124] [2022-04-06 20:46:36,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:36,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:46:36,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:36,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:46:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2022, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:46:36,848 INFO L87 Difference]: Start difference. First operand 1261 states and 1722 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:41,832 INFO L93 Difference]: Finished difference Result 1588 states and 2065 transitions. [2022-04-06 20:46:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:46:41,832 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:46:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:41,834 INFO L225 Difference]: With dead ends: 1588 [2022-04-06 20:46:41,834 INFO L226 Difference]: Without dead ends: 1560 [2022-04-06 20:46:41,834 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1418, Invalid=6238, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:46:41,835 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 70 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2865 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:41,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 176 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2865 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:46:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-04-06 20:46:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1261. [2022-04-06 20:46:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1256 states have (on average 1.3670382165605095) internal successors, (1717), 1256 states have internal predecessors, (1717), 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 20:46:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1721 transitions. [2022-04-06 20:46:42,822 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1721 transitions. Word has length 57 [2022-04-06 20:46:42,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:42,822 INFO L478 AbstractCegarLoop]: Abstraction has 1261 states and 1721 transitions. [2022-04-06 20:46:42,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1721 transitions. [2022-04-06 20:46:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:46:42,823 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:42,823 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:42,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-04-06 20:46:43,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:43,024 INFO L403 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:43,024 INFO L85 PathProgramCache]: Analyzing trace with hash -772182746, now seen corresponding path program 185 times [2022-04-06 20:46:43,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:43,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204559716] [2022-04-06 20:46:43,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:43,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:43,025 INFO L85 PathProgramCache]: Analyzing trace with hash -772182746, now seen corresponding path program 186 times [2022-04-06 20:46:43,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:43,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024016710] [2022-04-06 20:46:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:43,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:43,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 20:46:43,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:43,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024016710] [2022-04-06 20:46:43,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024016710] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:43,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620686032] [2022-04-06 20:46:43,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:43,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:43,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:43,318 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:43,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-04-06 20:46:45,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:46:45,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:46:45,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 20:46:45,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 20:46:46,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620686032] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:46,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:46,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:46:46,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:46,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204559716] [2022-04-06 20:46:46,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204559716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:46,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:46,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:46:46,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127485014] [2022-04-06 20:46:46,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:46,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:46:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:46:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:46:46,146 INFO L87 Difference]: Start difference. First operand 1261 states and 1721 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:51,173 INFO L93 Difference]: Finished difference Result 1624 states and 2101 transitions. [2022-04-06 20:46:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:46:51,174 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:46:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:51,176 INFO L225 Difference]: With dead ends: 1624 [2022-04-06 20:46:51,176 INFO L226 Difference]: Without dead ends: 1596 [2022-04-06 20:46:51,176 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1297, Invalid=5509, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:46:51,176 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 79 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:51,176 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 172 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2750 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:46:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2022-04-06 20:46:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1261. [2022-04-06 20:46:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1256 states have (on average 1.3662420382165605) internal successors, (1716), 1256 states have internal predecessors, (1716), 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 20:46:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1720 transitions. [2022-04-06 20:46:52,156 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1720 transitions. Word has length 57 [2022-04-06 20:46:52,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:52,156 INFO L478 AbstractCegarLoop]: Abstraction has 1261 states and 1720 transitions. [2022-04-06 20:46:52,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1720 transitions. [2022-04-06 20:46:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:46:52,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:52,157 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:52,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-04-06 20:46:52,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:52,358 INFO L403 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:52,358 INFO L85 PathProgramCache]: Analyzing trace with hash -258896456, now seen corresponding path program 187 times [2022-04-06 20:46:52,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:52,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1308004124] [2022-04-06 20:46:52,359 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:52,359 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash -258896456, now seen corresponding path program 188 times [2022-04-06 20:46:52,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:52,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035204523] [2022-04-06 20:46:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:52,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:52,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 20:46:52,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:52,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035204523] [2022-04-06 20:46:52,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035204523] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:52,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486334761] [2022-04-06 20:46:52,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:52,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:52,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:52,647 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:52,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-04-06 20:46:52,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:52,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:52,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:46:52,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 20:46:52,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 20:46:53,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486334761] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:53,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:53,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:46:53,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:53,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1308004124] [2022-04-06 20:46:53,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1308004124] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:53,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:53,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:46:53,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385034861] [2022-04-06 20:46:53,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:53,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:46:53,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:53,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:46:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=1972, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:46:53,500 INFO L87 Difference]: Start difference. First operand 1261 states and 1720 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:58,775 INFO L93 Difference]: Finished difference Result 1661 states and 2138 transitions. [2022-04-06 20:46:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:46:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:46:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:58,777 INFO L225 Difference]: With dead ends: 1661 [2022-04-06 20:46:58,777 INFO L226 Difference]: Without dead ends: 1633 [2022-04-06 20:46:58,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1213, Invalid=4949, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:46:58,777 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 87 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3125 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 3215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:58,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 188 Invalid, 3215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3125 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:46:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2022-04-06 20:46:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1261. [2022-04-06 20:46:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1256 states have (on average 1.3654458598726114) internal successors, (1715), 1256 states have internal predecessors, (1715), 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 20:46:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1719 transitions. [2022-04-06 20:46:59,752 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1719 transitions. Word has length 57 [2022-04-06 20:46:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:59,752 INFO L478 AbstractCegarLoop]: Abstraction has 1261 states and 1719 transitions. [2022-04-06 20:46:59,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1719 transitions. [2022-04-06 20:46:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:46:59,753 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:59,753 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:59,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-04-06 20:46:59,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:59,954 INFO L403 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:59,954 INFO L85 PathProgramCache]: Analyzing trace with hash -519433498, now seen corresponding path program 189 times [2022-04-06 20:46:59,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:59,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165515163] [2022-04-06 20:46:59,955 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:59,955 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:59,955 INFO L85 PathProgramCache]: Analyzing trace with hash -519433498, now seen corresponding path program 190 times [2022-04-06 20:46:59,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:59,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972749573] [2022-04-06 20:46:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:59,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:00,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 20:47:00,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:00,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972749573] [2022-04-06 20:47:00,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972749573] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:00,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706760088] [2022-04-06 20:47:00,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:00,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:00,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:00,245 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:00,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-04-06 20:47:00,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:00,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:00,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:47:00,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 20:47:00,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 20:47:01,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706760088] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:01,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:01,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:47:01,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:01,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165515163] [2022-04-06 20:47:01,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165515163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:01,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:01,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:47:01,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60314648] [2022-04-06 20:47:01,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:01,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:47:01,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:01,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:47:01,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1941, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:47:01,094 INFO L87 Difference]: Start difference. First operand 1261 states and 1719 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:06,360 INFO L93 Difference]: Finished difference Result 1699 states and 2176 transitions. [2022-04-06 20:47:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:47:06,360 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:47:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:06,362 INFO L225 Difference]: With dead ends: 1699 [2022-04-06 20:47:06,362 INFO L226 Difference]: Without dead ends: 1671 [2022-04-06 20:47:06,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1166, Invalid=4534, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:47:06,363 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 96 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:06,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 184 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:47:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-04-06 20:47:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1261. [2022-04-06 20:47:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1256 states have (on average 1.3646496815286624) internal successors, (1714), 1256 states have internal predecessors, (1714), 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 20:47:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1718 transitions. [2022-04-06 20:47:07,357 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1718 transitions. Word has length 57 [2022-04-06 20:47:07,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:07,357 INFO L478 AbstractCegarLoop]: Abstraction has 1261 states and 1718 transitions. [2022-04-06 20:47:07,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:07,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1718 transitions. [2022-04-06 20:47:07,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:47:07,358 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:07,358 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:07,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-04-06 20:47:07,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:07,558 INFO L403 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:07,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:07,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1913311240, now seen corresponding path program 191 times [2022-04-06 20:47:07,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:07,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640097992] [2022-04-06 20:47:07,559 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:07,559 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:07,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1913311240, now seen corresponding path program 192 times [2022-04-06 20:47:07,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:07,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51973132] [2022-04-06 20:47:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:07,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:07,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-04-06 20:47:07,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:07,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51973132] [2022-04-06 20:47:07,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51973132] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:07,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934073380] [2022-04-06 20:47:07,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:07,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:07,853 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:07,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-04-06 20:47:07,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:47:07,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:07,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:47:07,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-04-06 20:47:08,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-04-06 20:47:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934073380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:08,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:08,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 6, 6] total 32 [2022-04-06 20:47:08,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:08,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640097992] [2022-04-06 20:47:08,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640097992] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:08,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:08,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:47:08,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710876415] [2022-04-06 20:47:08,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:08,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:47:08,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:08,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:47:08,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:47:08,176 INFO L87 Difference]: Start difference. First operand 1261 states and 1718 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:13,696 INFO L93 Difference]: Finished difference Result 1738 states and 2215 transitions. [2022-04-06 20:47:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:47:13,696 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:47:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:13,698 INFO L225 Difference]: With dead ends: 1738 [2022-04-06 20:47:13,698 INFO L226 Difference]: Without dead ends: 1710 [2022-04-06 20:47:13,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=2891, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:47:13,698 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 112 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:13,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 198 Invalid, 3514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3424 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:47:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-04-06 20:47:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1261. [2022-04-06 20:47:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1256 states have (on average 1.3638535031847134) internal successors, (1713), 1256 states have internal predecessors, (1713), 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 20:47:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1717 transitions. [2022-04-06 20:47:14,674 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1717 transitions. Word has length 57 [2022-04-06 20:47:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:14,674 INFO L478 AbstractCegarLoop]: Abstraction has 1261 states and 1717 transitions. [2022-04-06 20:47:14,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1717 transitions. [2022-04-06 20:47:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:47:14,675 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:14,675 INFO L499 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:14,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-04-06 20:47:14,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-04-06 20:47:14,876 INFO L403 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:14,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1120760328, now seen corresponding path program 83 times [2022-04-06 20:47:14,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:14,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [924519865] [2022-04-06 20:47:14,877 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:14,877 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1120760328, now seen corresponding path program 84 times [2022-04-06 20:47:14,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:14,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160228602] [2022-04-06 20:47:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:15,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:15,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:15,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160228602] [2022-04-06 20:47:15,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160228602] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:15,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350532370] [2022-04-06 20:47:15,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:15,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:15,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:15,694 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:15,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-04-06 20:47:26,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 20:47:26,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:26,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:47:26,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:26,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:28,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350532370] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:28,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:28,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 20:47:28,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:28,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [924519865] [2022-04-06 20:47:28,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [924519865] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:28,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:28,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:47:28,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789650455] [2022-04-06 20:47:28,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:28,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:47:28,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:47:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2032, Invalid=6340, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:47:28,707 INFO L87 Difference]: Start difference. First operand 1261 states and 1717 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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 20:47:38,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:38,721 INFO L93 Difference]: Finished difference Result 2172 states and 3349 transitions. [2022-04-06 20:47:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:47:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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 20:47:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:38,724 INFO L225 Difference]: With dead ends: 2172 [2022-04-06 20:47:38,724 INFO L226 Difference]: Without dead ends: 2125 [2022-04-06 20:47:38,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4102, Invalid=14258, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:47:38,725 INFO L913 BasicCegarLoop]: 190 mSDtfsCounter, 314 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 15133 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 15362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 15133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:38,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 412 Invalid, 15362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 15133 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 20:47:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2022-04-06 20:47:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1294. [2022-04-06 20:47:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1289 states have (on average 1.3669511249030255) internal successors, (1762), 1289 states have internal predecessors, (1762), 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 20:47:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1766 transitions. [2022-04-06 20:47:39,733 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1766 transitions. Word has length 57 [2022-04-06 20:47:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:39,733 INFO L478 AbstractCegarLoop]: Abstraction has 1294 states and 1766 transitions. [2022-04-06 20:47:39,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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 20:47:39,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1766 transitions. [2022-04-06 20:47:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:47:39,734 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:39,734 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:39,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:39,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-04-06 20:47:39,937 INFO L403 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -650340288, now seen corresponding path program 55 times [2022-04-06 20:47:39,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:39,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925554241] [2022-04-06 20:47:39,938 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:39,939 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash -650340288, now seen corresponding path program 56 times [2022-04-06 20:47:39,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:39,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545422896] [2022-04-06 20:47:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:39,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:40,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:47:40,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:40,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545422896] [2022-04-06 20:47:40,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545422896] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:40,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494775793] [2022-04-06 20:47:40,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:40,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:40,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:40,373 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:40,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-04-06 20:47:40,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:40,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:40,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 20:47:40,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:47:40,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:47:42,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494775793] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:42,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:42,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 78 [2022-04-06 20:47:42,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:42,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925554241] [2022-04-06 20:47:42,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925554241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:42,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:42,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:47:42,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963660347] [2022-04-06 20:47:42,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:42,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:47:42,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:42,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:47:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=858, Invalid=5148, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:47:42,181 INFO L87 Difference]: Start difference. First operand 1294 states and 1766 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 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 20:47:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:49,304 INFO L93 Difference]: Finished difference Result 1561 states and 2047 transitions. [2022-04-06 20:47:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-04-06 20:47:49,305 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 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 58 [2022-04-06 20:47:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:49,306 INFO L225 Difference]: With dead ends: 1561 [2022-04-06 20:47:49,306 INFO L226 Difference]: Without dead ends: 1425 [2022-04-06 20:47:49,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15648 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6053, Invalid=48937, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 20:47:49,308 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6325 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 6639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 6325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:49,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 187 Invalid, 6639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 6325 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:47:49,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2022-04-06 20:47:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1293. [2022-04-06 20:47:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1288 states have (on average 1.361024844720497) internal successors, (1753), 1288 states have internal predecessors, (1753), 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 20:47:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1757 transitions. [2022-04-06 20:47:50,312 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1757 transitions. Word has length 58 [2022-04-06 20:47:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:50,312 INFO L478 AbstractCegarLoop]: Abstraction has 1293 states and 1757 transitions. [2022-04-06 20:47:50,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 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 20:47:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1757 transitions. [2022-04-06 20:47:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:47:50,313 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:50,313 INFO L499 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:50,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:50,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-04-06 20:47:50,514 INFO L403 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:50,514 INFO L85 PathProgramCache]: Analyzing trace with hash 652873153, now seen corresponding path program 85 times [2022-04-06 20:47:50,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:50,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1929802933] [2022-04-06 20:47:50,515 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:50,515 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash 652873153, now seen corresponding path program 86 times [2022-04-06 20:47:50,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:50,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117327192] [2022-04-06 20:47:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:50,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:51,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:51,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117327192] [2022-04-06 20:47:51,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117327192] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995878647] [2022-04-06 20:47:51,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:51,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:51,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:51,368 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:51,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-04-06 20:47:51,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:51,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:51,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 20:47:51,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:51,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:54,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995878647] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:54,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:54,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-04-06 20:47:54,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:54,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1929802933] [2022-04-06 20:47:54,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1929802933] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:54,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:54,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:47:54,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56093954] [2022-04-06 20:47:54,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:54,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:47:54,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:47:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2123, Invalid=6619, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:47:54,048 INFO L87 Difference]: Start difference. First operand 1293 states and 1757 transitions. Second operand has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:04,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:04,430 INFO L93 Difference]: Finished difference Result 2221 states and 3422 transitions. [2022-04-06 20:48:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:48:04,430 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:48:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:04,432 INFO L225 Difference]: With dead ends: 2221 [2022-04-06 20:48:04,432 INFO L226 Difference]: Without dead ends: 2174 [2022-04-06 20:48:04,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4285, Invalid=14897, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:48:04,433 INFO L913 BasicCegarLoop]: 195 mSDtfsCounter, 330 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 15880 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 16122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 15880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:04,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 422 Invalid, 16122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 15880 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 20:48:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-04-06 20:48:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1326. [2022-04-06 20:48:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1321 states have (on average 1.364118092354277) internal successors, (1802), 1321 states have internal predecessors, (1802), 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 20:48:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1806 transitions. [2022-04-06 20:48:05,454 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1806 transitions. Word has length 58 [2022-04-06 20:48:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:05,454 INFO L478 AbstractCegarLoop]: Abstraction has 1326 states and 1806 transitions. [2022-04-06 20:48:05,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1806 transitions. [2022-04-06 20:48:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:48:05,455 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:05,456 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:05,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:05,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-04-06 20:48:05,656 INFO L403 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:05,656 INFO L85 PathProgramCache]: Analyzing trace with hash -884456376, now seen corresponding path program 193 times [2022-04-06 20:48:05,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:05,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753938847] [2022-04-06 20:48:05,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:05,657 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:05,657 INFO L85 PathProgramCache]: Analyzing trace with hash -884456376, now seen corresponding path program 194 times [2022-04-06 20:48:05,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:05,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491012346] [2022-04-06 20:48:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:05,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:06,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:48:06,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:06,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491012346] [2022-04-06 20:48:06,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491012346] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:06,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645125366] [2022-04-06 20:48:06,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:06,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:06,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:06,757 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:06,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-04-06 20:48:07,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:07,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:07,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 141 conjunts are in the unsatisfiable core [2022-04-06 20:48:07,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:09,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:19,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645125366] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:19,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:19,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 46, 38] total 107 [2022-04-06 20:48:19,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:19,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753938847] [2022-04-06 20:48:19,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753938847] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:19,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:19,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:48:19,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149392062] [2022-04-06 20:48:19,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:19,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:48:19,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:19,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:48:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=10581, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:48:19,188 INFO L87 Difference]: Start difference. First operand 1326 states and 1806 transitions. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:24,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 20:48:27,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:27,190 INFO L93 Difference]: Finished difference Result 1355 states and 1835 transitions. [2022-04-06 20:48:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:48:27,190 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:48:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:27,191 INFO L225 Difference]: With dead ends: 1355 [2022-04-06 20:48:27,191 INFO L226 Difference]: Without dead ends: 1350 [2022-04-06 20:48:27,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=1121, Invalid=16969, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:48:27,192 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:27,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 148 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:48:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-04-06 20:48:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1326. [2022-04-06 20:48:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1321 states have (on average 1.364118092354277) internal successors, (1802), 1321 states have internal predecessors, (1802), 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 20:48:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1806 transitions. [2022-04-06 20:48:28,260 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1806 transitions. Word has length 59 [2022-04-06 20:48:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:28,260 INFO L478 AbstractCegarLoop]: Abstraction has 1326 states and 1806 transitions. [2022-04-06 20:48:28,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1806 transitions. [2022-04-06 20:48:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:48:28,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:28,261 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:28,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:28,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:28,462 INFO L403 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash -474660792, now seen corresponding path program 195 times [2022-04-06 20:48:28,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:28,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1898436282] [2022-04-06 20:48:28,463 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:28,463 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash -474660792, now seen corresponding path program 196 times [2022-04-06 20:48:28,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:28,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791602660] [2022-04-06 20:48:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:28,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:28,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 20:48:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:28,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791602660] [2022-04-06 20:48:28,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791602660] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:28,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446188591] [2022-04-06 20:48:28,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:28,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:28,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:28,777 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:28,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-04-06 20:48:28,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:28,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:28,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:48:28,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 20:48:28,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 20:48:29,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446188591] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:29,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:29,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:48:29,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:29,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1898436282] [2022-04-06 20:48:29,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1898436282] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:29,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:29,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:48:29,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530971570] [2022-04-06 20:48:29,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:29,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:48:29,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:48:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2223, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:48:29,646 INFO L87 Difference]: Start difference. First operand 1326 states and 1806 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:48:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:34,680 INFO L93 Difference]: Finished difference Result 1595 states and 2090 transitions. [2022-04-06 20:48:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:48:34,680 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 59 [2022-04-06 20:48:34,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:34,682 INFO L225 Difference]: With dead ends: 1595 [2022-04-06 20:48:34,682 INFO L226 Difference]: Without dead ends: 1566 [2022-04-06 20:48:34,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1691, Invalid=7815, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:48:34,683 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 62 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2666 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:34,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 160 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2666 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:48:34,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-04-06 20:48:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1326. [2022-04-06 20:48:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1321 states have (on average 1.3633610900832702) internal successors, (1801), 1321 states have internal predecessors, (1801), 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 20:48:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1805 transitions. [2022-04-06 20:48:35,760 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1805 transitions. Word has length 59 [2022-04-06 20:48:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:35,760 INFO L478 AbstractCegarLoop]: Abstraction has 1326 states and 1805 transitions. [2022-04-06 20:48:35,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:48:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1805 transitions. [2022-04-06 20:48:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:48:35,761 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:35,761 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:35,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-04-06 20:48:35,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:35,962 INFO L403 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:35,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:35,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1825361832, now seen corresponding path program 197 times [2022-04-06 20:48:35,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:35,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1403757131] [2022-04-06 20:48:35,962 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:35,963 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:35,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1825361832, now seen corresponding path program 198 times [2022-04-06 20:48:35,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:35,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192209121] [2022-04-06 20:48:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:35,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:36,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 20:48:36,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192209121] [2022-04-06 20:48:36,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192209121] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430932985] [2022-04-06 20:48:36,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:36,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:36,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:36,273 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:36,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-04-06 20:48:39,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:48:39,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:48:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 20:48:39,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 20:48:39,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430932985] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:39,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:39,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:48:39,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:39,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1403757131] [2022-04-06 20:48:39,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1403757131] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:39,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:39,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:48:39,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537739712] [2022-04-06 20:48:39,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:39,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:48:39,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:39,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:48:39,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=2206, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:48:39,935 INFO L87 Difference]: Start difference. First operand 1326 states and 1805 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:48:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:45,195 INFO L93 Difference]: Finished difference Result 1630 states and 2125 transitions. [2022-04-06 20:48:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:48:45,196 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 59 [2022-04-06 20:48:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:45,197 INFO L225 Difference]: With dead ends: 1630 [2022-04-06 20:48:45,197 INFO L226 Difference]: Without dead ends: 1601 [2022-04-06 20:48:45,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1648, Invalid=7472, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:48:45,198 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 71 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:45,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 169 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:48:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2022-04-06 20:48:46,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1326. [2022-04-06 20:48:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1321 states have (on average 1.3626040878122634) internal successors, (1800), 1321 states have internal predecessors, (1800), 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 20:48:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1804 transitions. [2022-04-06 20:48:46,274 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1804 transitions. Word has length 59 [2022-04-06 20:48:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:46,275 INFO L478 AbstractCegarLoop]: Abstraction has 1326 states and 1804 transitions. [2022-04-06 20:48:46,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:48:46,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1804 transitions. [2022-04-06 20:48:46,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:48:46,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:46,276 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:46,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:46,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:46,476 INFO L403 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:46,477 INFO L85 PathProgramCache]: Analyzing trace with hash -483459512, now seen corresponding path program 199 times [2022-04-06 20:48:46,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:46,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954302629] [2022-04-06 20:48:46,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:46,477 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:46,477 INFO L85 PathProgramCache]: Analyzing trace with hash -483459512, now seen corresponding path program 200 times [2022-04-06 20:48:46,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:46,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803325002] [2022-04-06 20:48:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:46,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:46,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-04-06 20:48:46,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:46,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803325002] [2022-04-06 20:48:46,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803325002] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:46,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686582920] [2022-04-06 20:48:46,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:46,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:46,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:46,798 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:46,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-04-06 20:48:46,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:46,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:46,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:48:46,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-04-06 20:48:46,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-04-06 20:48:47,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686582920] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:47,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:47,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:48:47,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:47,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954302629] [2022-04-06 20:48:47,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954302629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:47,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:47,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:48:47,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762554474] [2022-04-06 20:48:47,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:47,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:48:47,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:47,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:48:47,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=2185, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:48:47,678 INFO L87 Difference]: Start difference. First operand 1326 states and 1804 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:48:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:53,039 INFO L93 Difference]: Finished difference Result 1666 states and 2161 transitions. [2022-04-06 20:48:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:48:53,040 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 59 [2022-04-06 20:48:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:53,041 INFO L225 Difference]: With dead ends: 1666 [2022-04-06 20:48:53,041 INFO L226 Difference]: Without dead ends: 1637 [2022-04-06 20:48:53,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1517, Invalid=6673, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:48:53,042 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 79 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:53,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 164 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:48:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2022-04-06 20:48:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1326. [2022-04-06 20:48:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1321 states have (on average 1.3618470855412566) internal successors, (1799), 1321 states have internal predecessors, (1799), 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 20:48:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1803 transitions. [2022-04-06 20:48:54,117 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1803 transitions. Word has length 59 [2022-04-06 20:48:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:54,117 INFO L478 AbstractCegarLoop]: Abstraction has 1326 states and 1803 transitions. [2022-04-06 20:48:54,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:48:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1803 transitions. [2022-04-06 20:48:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:48:54,118 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:54,118 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:54,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-04-06 20:48:54,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:54,318 INFO L403 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash -24530344, now seen corresponding path program 201 times [2022-04-06 20:48:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:54,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1757667903] [2022-04-06 20:48:54,319 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:54,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash -24530344, now seen corresponding path program 202 times [2022-04-06 20:48:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:54,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702718864] [2022-04-06 20:48:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:54,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:54,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 20:48:54,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:54,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702718864] [2022-04-06 20:48:54,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702718864] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:54,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366252393] [2022-04-06 20:48:54,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:54,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:54,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:54,633 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:54,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-04-06 20:48:54,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:54,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:54,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:48:54,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 20:48:54,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 20:48:55,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366252393] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:55,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:55,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:48:55,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:55,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1757667903] [2022-04-06 20:48:55,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1757667903] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:55,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:55,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:48:55,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142171047] [2022-04-06 20:48:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:55,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:48:55,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:48:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=2160, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:48:55,526 INFO L87 Difference]: Start difference. First operand 1326 states and 1803 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:49:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:01,131 INFO L93 Difference]: Finished difference Result 1703 states and 2198 transitions. [2022-04-06 20:49:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:49:01,131 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 59 [2022-04-06 20:49:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:01,133 INFO L225 Difference]: With dead ends: 1703 [2022-04-06 20:49:01,133 INFO L226 Difference]: Without dead ends: 1674 [2022-04-06 20:49:01,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1394, Invalid=5916, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:49:01,134 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 88 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3282 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:01,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 190 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3282 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:49:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-04-06 20:49:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1326. [2022-04-06 20:49:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1321 states have (on average 1.3610900832702497) internal successors, (1798), 1321 states have internal predecessors, (1798), 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 20:49:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1802 transitions. [2022-04-06 20:49:02,226 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1802 transitions. Word has length 59 [2022-04-06 20:49:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:02,226 INFO L478 AbstractCegarLoop]: Abstraction has 1326 states and 1802 transitions. [2022-04-06 20:49:02,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:49:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1802 transitions. [2022-04-06 20:49:02,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:49:02,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:02,227 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:02,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-04-06 20:49:02,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:02,428 INFO L403 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:02,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1375747144, now seen corresponding path program 203 times [2022-04-06 20:49:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:02,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519862545] [2022-04-06 20:49:02,428 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:02,429 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1375747144, now seen corresponding path program 204 times [2022-04-06 20:49:02,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:02,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263574944] [2022-04-06 20:49:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:02,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:02,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 20:49:02,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263574944] [2022-04-06 20:49:02,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263574944] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397147149] [2022-04-06 20:49:02,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:02,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:02,746 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:02,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-04-06 20:49:03,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:49:03,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:49:03,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 20:49:04,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 65 proven. 11 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 20:49:04,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397147149] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:04,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:04,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10, 10] total 40 [2022-04-06 20:49:04,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:04,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519862545] [2022-04-06 20:49:04,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519862545] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:04,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:04,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:49:04,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751975093] [2022-04-06 20:49:04,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:04,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:49:04,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:49:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:49:04,487 INFO L87 Difference]: Start difference. First operand 1326 states and 1802 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:49:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:10,213 INFO L93 Difference]: Finished difference Result 1741 states and 2236 transitions. [2022-04-06 20:49:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:49:10,213 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 59 [2022-04-06 20:49:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:10,215 INFO L225 Difference]: With dead ends: 1741 [2022-04-06 20:49:10,215 INFO L226 Difference]: Without dead ends: 1712 [2022-04-06 20:49:10,215 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=341, Invalid=4489, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:49:10,216 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 96 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3159 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:10,216 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 186 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3159 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:49:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-04-06 20:49:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1326. [2022-04-06 20:49:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1321 states have (on average 1.360333080999243) internal successors, (1797), 1321 states have internal predecessors, (1797), 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 20:49:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1801 transitions. [2022-04-06 20:49:11,306 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1801 transitions. Word has length 59 [2022-04-06 20:49:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:11,306 INFO L478 AbstractCegarLoop]: Abstraction has 1326 states and 1801 transitions. [2022-04-06 20:49:11,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:49:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1801 transitions. [2022-04-06 20:49:11,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:49:11,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:11,308 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:11,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:11,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:11,512 INFO L403 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:11,512 INFO L85 PathProgramCache]: Analyzing trace with hash -241650600, now seen corresponding path program 205 times [2022-04-06 20:49:11,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:11,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [729052147] [2022-04-06 20:49:11,513 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:11,513 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:11,513 INFO L85 PathProgramCache]: Analyzing trace with hash -241650600, now seen corresponding path program 206 times [2022-04-06 20:49:11,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:11,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694794082] [2022-04-06 20:49:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:11,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:11,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-04-06 20:49:11,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:11,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694794082] [2022-04-06 20:49:11,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694794082] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:11,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797276273] [2022-04-06 20:49:11,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:11,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:11,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:11,824 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:11,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-04-06 20:49:11,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:11,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:49:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-04-06 20:49:11,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-04-06 20:49:12,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797276273] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:12,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:12,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:49:12,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:12,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [729052147] [2022-04-06 20:49:12,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [729052147] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:12,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:12,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:49:12,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446209658] [2022-04-06 20:49:12,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:12,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:49:12,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:12,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:49:12,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=2098, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:49:12,730 INFO L87 Difference]: Start difference. First operand 1326 states and 1801 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:49:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:18,589 INFO L93 Difference]: Finished difference Result 1780 states and 2275 transitions. [2022-04-06 20:49:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:49:18,590 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 59 [2022-04-06 20:49:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:18,591 INFO L225 Difference]: With dead ends: 1780 [2022-04-06 20:49:18,591 INFO L226 Difference]: Without dead ends: 1751 [2022-04-06 20:49:18,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1262, Invalid=4900, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:49:18,592 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 105 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3452 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:18,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 197 Invalid, 3543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3452 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:49:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-04-06 20:49:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1326. [2022-04-06 20:49:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1321 states have (on average 1.3595760787282363) internal successors, (1796), 1321 states have internal predecessors, (1796), 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 20:49:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1800 transitions. [2022-04-06 20:49:19,690 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1800 transitions. Word has length 59 [2022-04-06 20:49:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:19,690 INFO L478 AbstractCegarLoop]: Abstraction has 1326 states and 1800 transitions. [2022-04-06 20:49:19,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20:49:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1800 transitions. [2022-04-06 20:49:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:49:19,691 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:19,691 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:19,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-04-06 20:49:19,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-04-06 20:49:19,892 INFO L403 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:19,892 INFO L85 PathProgramCache]: Analyzing trace with hash 537459272, now seen corresponding path program 207 times [2022-04-06 20:49:19,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:19,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [581510044] [2022-04-06 20:49:19,892 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:19,892 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash 537459272, now seen corresponding path program 208 times [2022-04-06 20:49:19,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:19,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201754482] [2022-04-06 20:49:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:19,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:20,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-04-06 20:49:20,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:20,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201754482] [2022-04-06 20:49:20,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201754482] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:20,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437331480] [2022-04-06 20:49:20,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:20,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:20,203 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:20,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-04-06 20:49:20,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:20,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:20,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:49:20,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-04-06 20:49:20,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-04-06 20:49:21,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437331480] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:21,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:21,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:49:21,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:21,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [581510044] [2022-04-06 20:49:21,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [581510044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:21,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:21,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:49:21,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948189120] [2022-04-06 20:49:21,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:21,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:49:21,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:49:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=2061, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:49:21,122 INFO L87 Difference]: Start difference. First operand 1326 states and 1800 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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)