/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/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 07:18:17,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 07:18:17,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 07:18:17,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 07:18:17,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 07:18:17,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 07:18:17,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 07:18:17,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 07:18:17,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 07:18:17,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 07:18:17,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 07:18:17,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 07:18:17,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 07:18:17,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 07:18:17,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 07:18:17,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 07:18:17,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 07:18:17,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 07:18:17,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 07:18:17,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 07:18:17,813 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 07:18:17,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 07:18:17,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 07:18:17,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 07:18:17,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 07:18:17,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 07:18:17,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 07:18:17,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 07:18:17,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 07:18:17,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 07:18:17,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 07:18:17,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 07:18:17,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 07:18:17,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 07:18:17,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 07:18:17,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 07:18:17,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 07:18:17,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 07:18:17,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 07:18:17,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 07:18:17,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 07:18:17,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 07:18:17,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 07:18:17,840 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 07:18:17,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 07:18:17,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 07:18:17,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 07:18:17,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 07:18:17,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 07:18:17,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 07:18:17,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 07:18:17,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 07:18:17,847 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 07:18:17,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 07:18:17,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 07:18:17,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 07:18:17,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 07:18:17,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 07:18:17,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:18:17,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 07:18:17,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 07:18:17,848 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 07:18:17,848 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 07:18:17,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 07:18:17,848 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 07:18:17,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 07:18:18,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 07:18:18,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 07:18:18,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 07:18:18,057 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 07:18:18,060 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 07:18:18,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2022-03-19 07:18:18,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8f2289e8/bc13f4bcf9644abb8c3c4f67ca1058e1/FLAG6fc84e084 [2022-03-19 07:18:18,500 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 07:18:18,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c [2022-03-19 07:18:18,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8f2289e8/bc13f4bcf9644abb8c3c4f67ca1058e1/FLAG6fc84e084 [2022-03-19 07:18:18,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8f2289e8/bc13f4bcf9644abb8c3c4f67ca1058e1 [2022-03-19 07:18:18,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 07:18:18,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 07:18:18,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 07:18:18,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 07:18:18,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 07:18:18,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:18:18" (1/1) ... [2022-03-19 07:18:18,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d42714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18, skipping insertion in model container [2022-03-19 07:18:18,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:18:18" (1/1) ... [2022-03-19 07:18:18,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 07:18:18,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 07:18:18,699 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/heavy-1.c[600,613] [2022-03-19 07:18:18,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:18:18,746 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 07:18:18,760 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/heavy-1.c[600,613] [2022-03-19 07:18:18,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:18:18,823 INFO L208 MainTranslator]: Completed translation [2022-03-19 07:18:18,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18 WrapperNode [2022-03-19 07:18:18,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 07:18:18,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 07:18:18,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 07:18:18,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 07:18:18,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18" (1/1) ... [2022-03-19 07:18:18,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18" (1/1) ... [2022-03-19 07:18:18,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18" (1/1) ... [2022-03-19 07:18:18,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18" (1/1) ... [2022-03-19 07:18:18,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18" (1/1) ... [2022-03-19 07:18:18,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18" (1/1) ... [2022-03-19 07:18:18,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18" (1/1) ... [2022-03-19 07:18:18,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 07:18:18,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 07:18:18,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 07:18:18,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 07:18:18,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18" (1/1) ... [2022-03-19 07:18:18,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:18:18,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:18,871 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) [2022-03-19 07:18:18,889 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 [2022-03-19 07:18:18,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 07:18:18,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 07:18:18,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 07:18:18,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 07:18:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 07:18:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 07:18:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 07:18:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 07:18:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 07:18:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 07:18:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 07:18:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 07:18:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 07:18:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-19 07:18:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 07:18:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 07:18:18,944 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 07:18:18,945 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 07:18:19,029 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 07:18:19,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 07:18:19,033 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 07:18:19,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:18:19 BoogieIcfgContainer [2022-03-19 07:18:19,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 07:18:19,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 07:18:19,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 07:18:19,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 07:18:19,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 07:18:18" (1/3) ... [2022-03-19 07:18:19,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2e56d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:18:19, skipping insertion in model container [2022-03-19 07:18:19,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:18" (2/3) ... [2022-03-19 07:18:19,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2e56d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:18:19, skipping insertion in model container [2022-03-19 07:18:19,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:18:19" (3/3) ... [2022-03-19 07:18:19,040 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2022-03-19 07:18:19,043 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 07:18:19,043 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 07:18:19,098 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 07:18:19,104 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 [2022-03-19 07:18:19,104 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 07:18:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:18:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-19 07:18:19,141 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:19,141 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:19,142 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:19,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 1 times [2022-03-19 07:18:19,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:19,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500143489] [2022-03-19 07:18:19,157 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:18:19,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 2 times [2022-03-19 07:18:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:19,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731198865] [2022-03-19 07:18:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:19,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:19,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:19,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731198865] [2022-03-19 07:18:19,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731198865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:19,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:19,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 07:18:19,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:19,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500143489] [2022-03-19 07:18:19,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500143489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:19,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:19,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 07:18:19,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725818712] [2022-03-19 07:18:19,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:19,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 07:18:19,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:19,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 07:18:19,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 07:18:19,390 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:19,457 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2022-03-19 07:18:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 07:18:19,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-19 07:18:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:19,465 INFO L225 Difference]: With dead ends: 42 [2022-03-19 07:18:19,465 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 07:18:19,468 INFO L911 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 [2022-03-19 07:18:19,473 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:19,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 07:18:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2022-03-19 07:18:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-03-19 07:18:19,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-03-19 07:18:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:19,501 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-03-19 07:18:19,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-03-19 07:18:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-19 07:18:19,502 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:19,502 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:19,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 07:18:19,503 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:19,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 1 times [2022-03-19 07:18:19,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:19,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2042545488] [2022-03-19 07:18:19,507 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:18:19,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 2 times [2022-03-19 07:18:19,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:19,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15752894] [2022-03-19 07:18:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:19,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:19,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:19,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15752894] [2022-03-19 07:18:19,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15752894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:19,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:19,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:18:19,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:19,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2042545488] [2022-03-19 07:18:19,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2042545488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:19,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:19,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:18:19,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253314977] [2022-03-19 07:18:19,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:19,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 07:18:19,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 07:18:19,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 07:18:19,591 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:19,650 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-03-19 07:18:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:18:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-19 07:18:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:19,652 INFO L225 Difference]: With dead ends: 36 [2022-03-19 07:18:19,652 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 07:18:19,653 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:18:19,654 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:19,654 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 07:18:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2022-03-19 07:18:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-19 07:18:19,658 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-03-19 07:18:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:19,658 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-19 07:18:19,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-19 07:18:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 07:18:19,659 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:19,659 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:19,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 07:18:19,661 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:19,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:19,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 1 times [2022-03-19 07:18:19,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:19,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [889592194] [2022-03-19 07:18:19,770 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:18:19,771 INFO L85 PathProgramCache]: Analyzing trace with hash 254700179, now seen corresponding path program 1 times [2022-03-19 07:18:19,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:19,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481720531] [2022-03-19 07:18:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:19,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:19,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:19,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481720531] [2022-03-19 07:18:19,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481720531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:19,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:19,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:18:19,886 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:19,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [889592194] [2022-03-19 07:18:19,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [889592194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:19,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:19,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:18:19,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27048697] [2022-03-19 07:18:19,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:19,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 07:18:19,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 07:18:19,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:18:19,888 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:19,965 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-03-19 07:18:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 07:18:19,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 07:18:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:19,967 INFO L225 Difference]: With dead ends: 48 [2022-03-19 07:18:19,967 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 07:18:19,968 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-19 07:18:19,968 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:19,969 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 19 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 07:18:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 17. [2022-03-19 07:18:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-19 07:18:19,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-03-19 07:18:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:19,972 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-19 07:18:19,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-19 07:18:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 07:18:19,972 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:19,973 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:19,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 07:18:19,973 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 1 times [2022-03-19 07:18:19,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:19,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149790678] [2022-03-19 07:18:20,254 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-19 07:18:20,254 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:20,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 2 times [2022-03-19 07:18:20,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:20,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748855248] [2022-03-19 07:18:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:20,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:20,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:20,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:20,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748855248] [2022-03-19 07:18:20,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748855248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:20,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:20,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:18:20,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:20,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149790678] [2022-03-19 07:18:20,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149790678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:20,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:20,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:18:20,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539915195] [2022-03-19 07:18:20,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:20,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 07:18:20,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:20,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 07:18:20,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 07:18:20,290 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:20,328 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-03-19 07:18:20,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:18:20,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 07:18:20,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:20,329 INFO L225 Difference]: With dead ends: 29 [2022-03-19 07:18:20,329 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 07:18:20,330 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:18:20,330 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:20,331 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 07:18:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-03-19 07:18:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-19 07:18:20,333 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2022-03-19 07:18:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:20,333 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-19 07:18:20,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-19 07:18:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 07:18:20,334 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:20,334 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:20,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 07:18:20,334 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:20,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 1 times [2022-03-19 07:18:20,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:20,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [738100492] [2022-03-19 07:18:20,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:20,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:20,412 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:20,412 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:20,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 2 times [2022-03-19 07:18:20,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:20,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203177666] [2022-03-19 07:18:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:20,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:20,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:20,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:20,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203177666] [2022-03-19 07:18:20,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203177666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:20,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288612327] [2022-03-19 07:18:20,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:18:20,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:20,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:20,518 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) [2022-03-19 07:18:20,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 07:18:20,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:18:20,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:20,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 07:18:20,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:18:20,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:18:20,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288612327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:20,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:20,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-19 07:18:20,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:20,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [738100492] [2022-03-19 07:18:20,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [738100492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:20,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:20,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:18:20,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420840162] [2022-03-19 07:18:20,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:20,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 07:18:20,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 07:18:20,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 07:18:20,716 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:20,754 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-03-19 07:18:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 07:18:20,757 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 07:18:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:20,758 INFO L225 Difference]: With dead ends: 32 [2022-03-19 07:18:20,758 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 07:18:20,758 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-19 07:18:20,759 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:20,759 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 07:18:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-03-19 07:18:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-19 07:18:20,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-03-19 07:18:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:20,763 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-19 07:18:20,763 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-19 07:18:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 07:18:20,764 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:20,764 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:20,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 07:18:20,982 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:20,983 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash -846064617, now seen corresponding path program 3 times [2022-03-19 07:18:20,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:20,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018333170] [2022-03-19 07:18:21,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:21,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:21,110 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:21,110 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:21,111 INFO L85 PathProgramCache]: Analyzing trace with hash -846064617, now seen corresponding path program 4 times [2022-03-19 07:18:21,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:21,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475577731] [2022-03-19 07:18:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:21,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:21,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:21,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475577731] [2022-03-19 07:18:21,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475577731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627764120] [2022-03-19 07:18:21,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:18:21,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:21,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:21,220 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) [2022-03-19 07:18:21,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 07:18:21,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:18:21,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:21,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:21,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 07:18:21,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 07:18:21,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627764120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:21,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:21,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-19 07:18:21,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:21,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1018333170] [2022-03-19 07:18:21,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1018333170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:21,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:21,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:18:21,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704665805] [2022-03-19 07:18:21,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:21,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 07:18:21,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 07:18:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-19 07:18:21,444 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:21,496 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-03-19 07:18:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 07:18:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 07:18:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:21,498 INFO L225 Difference]: With dead ends: 36 [2022-03-19 07:18:21,498 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 07:18:21,498 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-03-19 07:18:21,501 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:21,501 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 46 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 07:18:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-03-19 07:18:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-03-19 07:18:21,509 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-03-19 07:18:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:21,512 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-03-19 07:18:21,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-03-19 07:18:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 07:18:21,513 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:21,513 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:21,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 07:18:21,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-19 07:18:21,729 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash -617772747, now seen corresponding path program 5 times [2022-03-19 07:18:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:21,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1115890936] [2022-03-19 07:18:21,831 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:21,831 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:21,834 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:21,834 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:21,834 INFO L85 PathProgramCache]: Analyzing trace with hash -617772747, now seen corresponding path program 6 times [2022-03-19 07:18:21,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:21,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338726699] [2022-03-19 07:18:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:21,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:21,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:21,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:21,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338726699] [2022-03-19 07:18:21,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338726699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:21,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531231711] [2022-03-19 07:18:21,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:18:21,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:21,918 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) [2022-03-19 07:18:21,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 07:18:21,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:18:21,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:18:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 07:18:22,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 07:18:22,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531231711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:22,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:22,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2022-03-19 07:18:22,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:22,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1115890936] [2022-03-19 07:18:22,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1115890936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:22,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:22,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:18:22,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026858165] [2022-03-19 07:18:22,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:22,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 07:18:22,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:22,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 07:18:22,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 07:18:22,131 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:22,206 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-03-19 07:18:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:18:22,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 07:18:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:22,208 INFO L225 Difference]: With dead ends: 40 [2022-03-19 07:18:22,209 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 07:18:22,209 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-19 07:18:22,215 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:22,215 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 36 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:22,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 07:18:22,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-03-19 07:18:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-19 07:18:22,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2022-03-19 07:18:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:22,225 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-19 07:18:22,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-19 07:18:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 07:18:22,229 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:22,230 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:22,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:22,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:22,444 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:22,444 INFO L85 PathProgramCache]: Analyzing trace with hash -272617773, now seen corresponding path program 7 times [2022-03-19 07:18:22,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:22,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [962006876] [2022-03-19 07:18:22,595 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:22,595 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:22,599 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:22,599 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash -272617773, now seen corresponding path program 8 times [2022-03-19 07:18:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:22,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500140050] [2022-03-19 07:18:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:22,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:22,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:22,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:22,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500140050] [2022-03-19 07:18:22,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500140050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:22,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141332658] [2022-03-19 07:18:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:18:22,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:22,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:22,683 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) [2022-03-19 07:18:22,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 07:18:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:18:22,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:18:22,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:18:22,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141332658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:22,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:22,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2022-03-19 07:18:22,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:22,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [962006876] [2022-03-19 07:18:22,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [962006876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:22,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:22,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 07:18:22,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716427777] [2022-03-19 07:18:22,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:22,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 07:18:22,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:22,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 07:18:22,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-19 07:18:22,896 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:22,974 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-03-19 07:18:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 07:18:22,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 07:18:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:22,975 INFO L225 Difference]: With dead ends: 44 [2022-03-19 07:18:22,975 INFO L226 Difference]: Without dead ends: 28 [2022-03-19 07:18:22,975 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:18:22,976 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:22,976 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:18:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-19 07:18:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-03-19 07:18:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-03-19 07:18:22,979 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2022-03-19 07:18:22,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:22,979 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-03-19 07:18:22,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-03-19 07:18:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 07:18:22,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:22,980 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:23,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:23,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:23,195 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:23,196 INFO L85 PathProgramCache]: Analyzing trace with hash 708830449, now seen corresponding path program 9 times [2022-03-19 07:18:23,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:23,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [968183286] [2022-03-19 07:18:23,339 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:23,339 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:23,345 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:23,345 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:23,345 INFO L85 PathProgramCache]: Analyzing trace with hash 708830449, now seen corresponding path program 10 times [2022-03-19 07:18:23,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:23,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240664921] [2022-03-19 07:18:23,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:23,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:23,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:23,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:23,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240664921] [2022-03-19 07:18:23,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240664921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:23,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408348732] [2022-03-19 07:18:23,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:18:23,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:23,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:23,448 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) [2022-03-19 07:18:23,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 07:18:23,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:18:23,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:23,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 07:18:23,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 07:18:23,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408348732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:23,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:23,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2022-03-19 07:18:23,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:23,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [968183286] [2022-03-19 07:18:23,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [968183286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:23,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:23,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 07:18:23,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263108135] [2022-03-19 07:18:23,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:23,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 07:18:23,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:23,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 07:18:23,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:18:23,766 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:23,865 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-03-19 07:18:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 07:18:23,866 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 07:18:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:23,866 INFO L225 Difference]: With dead ends: 48 [2022-03-19 07:18:23,866 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 07:18:23,866 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:18:23,867 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:23,867 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 56 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:18:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 07:18:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-03-19 07:18:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-19 07:18:23,870 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2022-03-19 07:18:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:23,870 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-19 07:18:23,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-19 07:18:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 07:18:23,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:23,871 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:23,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:24,084 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:24,085 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1012233329, now seen corresponding path program 11 times [2022-03-19 07:18:24,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:24,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1132837584] [2022-03-19 07:18:24,238 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:24,239 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:24,243 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:24,243 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1012233329, now seen corresponding path program 12 times [2022-03-19 07:18:24,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:24,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826397507] [2022-03-19 07:18:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:24,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:24,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:24,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:24,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826397507] [2022-03-19 07:18:24,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826397507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:24,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36732239] [2022-03-19 07:18:24,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:18:24,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:24,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:24,357 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) [2022-03-19 07:18:24,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 07:18:24,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:18:24,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:24,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:18:24,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 07:18:24,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 07:18:24,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36732239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:24,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:24,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 14 [2022-03-19 07:18:24,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:24,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1132837584] [2022-03-19 07:18:24,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1132837584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:24,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:24,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 07:18:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839838842] [2022-03-19 07:18:24,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:24,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 07:18:24,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:24,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 07:18:24,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-19 07:18:24,543 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:24,670 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-03-19 07:18:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 07:18:24,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 07:18:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:24,671 INFO L225 Difference]: With dead ends: 52 [2022-03-19 07:18:24,671 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 07:18:24,671 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-19 07:18:24,672 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:24,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:18:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 07:18:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-03-19 07:18:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-19 07:18:24,675 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2022-03-19 07:18:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:24,675 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-19 07:18:24,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-19 07:18:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 07:18:24,675 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:24,676 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:24,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:24,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:24,885 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1392115027, now seen corresponding path program 13 times [2022-03-19 07:18:24,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:24,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407519533] [2022-03-19 07:18:25,067 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:25,067 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:25,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:25,074 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:25,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1392115027, now seen corresponding path program 14 times [2022-03-19 07:18:25,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:25,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877876940] [2022-03-19 07:18:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:25,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:25,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:25,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:25,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877876940] [2022-03-19 07:18:25,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877876940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:25,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689059830] [2022-03-19 07:18:25,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:18:25,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:25,263 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) [2022-03-19 07:18:25,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 07:18:25,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:18:25,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:25,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-19 07:18:25,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-19 07:18:25,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689059830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:25,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:25,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 19 [2022-03-19 07:18:25,578 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407519533] [2022-03-19 07:18:25,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407519533] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:25,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:25,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 07:18:25,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122258435] [2022-03-19 07:18:25,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:25,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 07:18:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 07:18:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-19 07:18:25,579 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:25,719 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-03-19 07:18:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:18:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 07:18:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:25,719 INFO L225 Difference]: With dead ends: 56 [2022-03-19 07:18:25,720 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 07:18:25,720 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-19 07:18:25,720 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:25,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:18:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 07:18:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-19 07:18:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-03-19 07:18:25,723 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2022-03-19 07:18:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:25,723 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-03-19 07:18:25,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-03-19 07:18:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 07:18:25,724 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:25,724 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:25,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:25,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:25,937 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1386206645, now seen corresponding path program 15 times [2022-03-19 07:18:25,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:25,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497795499] [2022-03-19 07:18:26,111 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:26,112 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:26,121 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:26,121 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:26,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1386206645, now seen corresponding path program 16 times [2022-03-19 07:18:26,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:26,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141288391] [2022-03-19 07:18:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:26,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:26,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:26,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141288391] [2022-03-19 07:18:26,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141288391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:26,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623896144] [2022-03-19 07:18:26,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:18:26,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:26,274 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) [2022-03-19 07:18:26,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 07:18:26,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:18:26,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:26,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-19 07:18:26,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-19 07:18:26,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623896144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:26,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:26,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 20 [2022-03-19 07:18:26,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:26,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497795499] [2022-03-19 07:18:26,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497795499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:26,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:26,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:18:26,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837813653] [2022-03-19 07:18:26,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:26,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:18:26,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:18:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-19 07:18:26,604 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:26,783 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-03-19 07:18:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:18:26,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 07:18:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:26,784 INFO L225 Difference]: With dead ends: 60 [2022-03-19 07:18:26,784 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 07:18:26,784 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:18:26,785 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:26,785 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:18:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 07:18:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-03-19 07:18:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-03-19 07:18:26,788 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2022-03-19 07:18:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:26,789 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-03-19 07:18:26,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-03-19 07:18:26,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 07:18:26,789 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:26,789 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:26,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:27,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 07:18:27,007 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash -3218839, now seen corresponding path program 17 times [2022-03-19 07:18:27,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:27,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1566973819] [2022-03-19 07:18:27,192 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:27,192 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:27,202 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:27,202 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:27,202 INFO L85 PathProgramCache]: Analyzing trace with hash -3218839, now seen corresponding path program 18 times [2022-03-19 07:18:27,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:27,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924707493] [2022-03-19 07:18:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:27,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:27,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924707493] [2022-03-19 07:18:27,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924707493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878166708] [2022-03-19 07:18:27,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:18:27,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:27,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:27,395 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) [2022-03-19 07:18:27,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 07:18:27,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:18:27,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:27,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:18:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-19 07:18:27,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-03-19 07:18:27,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878166708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:27,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:27,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 17 [2022-03-19 07:18:27,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:27,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1566973819] [2022-03-19 07:18:27,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1566973819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:27,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:27,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:18:27,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132275479] [2022-03-19 07:18:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:27,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:18:27,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:18:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:18:27,653 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:27,882 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-03-19 07:18:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:18:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 07:18:27,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:27,884 INFO L225 Difference]: With dead ends: 64 [2022-03-19 07:18:27,884 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 07:18:27,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:18:27,885 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:27,885 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:18:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 07:18:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-19 07:18:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-03-19 07:18:27,891 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2022-03-19 07:18:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:27,891 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-03-19 07:18:27,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-03-19 07:18:27,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 07:18:27,892 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:27,892 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:27,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:28,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 07:18:28,109 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:28,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:28,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1903168263, now seen corresponding path program 19 times [2022-03-19 07:18:28,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:28,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373902142] [2022-03-19 07:18:28,241 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:28,242 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:28,251 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:28,251 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:28,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1903168263, now seen corresponding path program 20 times [2022-03-19 07:18:28,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:28,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500824525] [2022-03-19 07:18:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:28,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:28,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:28,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500824525] [2022-03-19 07:18:28,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500824525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:28,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756687198] [2022-03-19 07:18:28,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:18:28,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:28,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:28,412 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) [2022-03-19 07:18:28,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 07:18:28,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:18:28,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:28,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-03-19 07:18:28,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-03-19 07:18:28,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756687198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:28,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:28,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 22 [2022-03-19 07:18:28,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:28,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373902142] [2022-03-19 07:18:28,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373902142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:28,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:28,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:18:28,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533534093] [2022-03-19 07:18:28,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:28,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:18:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:28,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:18:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-19 07:18:28,717 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:28,908 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-03-19 07:18:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:18:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 07:18:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:28,909 INFO L225 Difference]: With dead ends: 68 [2022-03-19 07:18:28,909 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 07:18:28,909 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:18:28,910 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:28,910 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:18:28,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 07:18:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-03-19 07:18:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:28,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-03-19 07:18:28,913 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2022-03-19 07:18:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:28,913 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-03-19 07:18:28,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-03-19 07:18:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 07:18:28,914 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:28,914 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:28,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:29,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 07:18:29,123 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:29,124 INFO L85 PathProgramCache]: Analyzing trace with hash -9862107, now seen corresponding path program 21 times [2022-03-19 07:18:29,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:29,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336008286] [2022-03-19 07:18:29,232 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:29,232 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:29,241 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:29,241 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash -9862107, now seen corresponding path program 22 times [2022-03-19 07:18:29,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:29,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999847989] [2022-03-19 07:18:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:29,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:29,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:29,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999847989] [2022-03-19 07:18:29,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999847989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:29,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748535989] [2022-03-19 07:18:29,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:18:29,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:29,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:29,423 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) [2022-03-19 07:18:29,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 07:18:29,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:18:29,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:29,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:29,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-19 07:18:29,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-19 07:18:29,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748535989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:29,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:29,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 23 [2022-03-19 07:18:29,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:29,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336008286] [2022-03-19 07:18:29,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336008286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:29,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:29,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:18:29,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610080151] [2022-03-19 07:18:29,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:29,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:18:29,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:29,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:18:29,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:18:29,817 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:30,039 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2022-03-19 07:18:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:18:30,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 07:18:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:30,040 INFO L225 Difference]: With dead ends: 72 [2022-03-19 07:18:30,040 INFO L226 Difference]: Without dead ends: 42 [2022-03-19 07:18:30,040 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:18:30,041 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:30,041 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 106 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:18:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-19 07:18:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-03-19 07:18:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-03-19 07:18:30,044 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2022-03-19 07:18:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:30,044 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-03-19 07:18:30,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-03-19 07:18:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 07:18:30,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:30,045 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:30,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:30,252 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 07:18:30,252 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash -186044989, now seen corresponding path program 23 times [2022-03-19 07:18:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:30,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145700749] [2022-03-19 07:18:30,391 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:30,391 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:30,401 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:30,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash -186044989, now seen corresponding path program 24 times [2022-03-19 07:18:30,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:30,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332854447] [2022-03-19 07:18:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:30,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:30,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:30,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:30,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332854447] [2022-03-19 07:18:30,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332854447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:30,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227471541] [2022-03-19 07:18:30,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:18:30,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:30,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:30,577 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) [2022-03-19 07:18:30,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 07:18:30,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:18:30,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:18:30,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-19 07:18:30,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-19 07:18:30,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227471541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:30,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:30,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 4, 4] total 20 [2022-03-19 07:18:30,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:30,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145700749] [2022-03-19 07:18:30,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145700749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:30,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:30,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:18:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23588211] [2022-03-19 07:18:30,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:30,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:18:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:18:30,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-19 07:18:30,831 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:31,086 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-03-19 07:18:31,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:18:31,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 07:18:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:31,087 INFO L225 Difference]: With dead ends: 76 [2022-03-19 07:18:31,087 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 07:18:31,088 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:18:31,088 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:31,088 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 106 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:18:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 07:18:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-19 07:18:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-03-19 07:18:31,091 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2022-03-19 07:18:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:31,091 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-03-19 07:18:31,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-03-19 07:18:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 07:18:31,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:31,092 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:31,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:31,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 07:18:31,299 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1994070047, now seen corresponding path program 25 times [2022-03-19 07:18:31,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:31,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [30297402] [2022-03-19 07:18:31,421 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:31,421 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:31,432 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:31,432 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:31,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1994070047, now seen corresponding path program 26 times [2022-03-19 07:18:31,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:31,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476975216] [2022-03-19 07:18:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:31,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:31,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:31,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:31,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476975216] [2022-03-19 07:18:31,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476975216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:31,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900142949] [2022-03-19 07:18:31,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:18:31,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:31,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:31,794 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) [2022-03-19 07:18:31,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 07:18:31,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:18:31,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-03-19 07:18:32,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-03-19 07:18:32,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900142949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:32,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:32,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 25 [2022-03-19 07:18:32,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:32,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [30297402] [2022-03-19 07:18:32,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [30297402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:32,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:32,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:18:32,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983279949] [2022-03-19 07:18:32,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:32,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:18:32,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:18:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:18:32,194 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:32,498 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-03-19 07:18:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 07:18:32,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-19 07:18:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:32,499 INFO L225 Difference]: With dead ends: 80 [2022-03-19 07:18:32,499 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 07:18:32,499 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:18:32,499 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:32,500 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 106 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:18:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 07:18:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-03-19 07:18:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-19 07:18:32,505 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2022-03-19 07:18:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:32,505 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-19 07:18:32,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-19 07:18:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 07:18:32,505 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:32,505 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:32,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:32,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 07:18:32,715 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:32,716 INFO L85 PathProgramCache]: Analyzing trace with hash -44395905, now seen corresponding path program 27 times [2022-03-19 07:18:32,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:32,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [372879280] [2022-03-19 07:18:32,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:32,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:32,882 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:32,882 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:32,882 INFO L85 PathProgramCache]: Analyzing trace with hash -44395905, now seen corresponding path program 28 times [2022-03-19 07:18:32,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:32,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959568762] [2022-03-19 07:18:32,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:32,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:33,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:33,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:33,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959568762] [2022-03-19 07:18:33,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959568762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:33,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679138318] [2022-03-19 07:18:33,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:18:33,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:33,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:33,087 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) [2022-03-19 07:18:33,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 07:18:33,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:18:33,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:33,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-19 07:18:33,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-19 07:18:33,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679138318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:33,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:33,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 26 [2022-03-19 07:18:33,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:33,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [372879280] [2022-03-19 07:18:33,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [372879280] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:33,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:33,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:18:33,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694617080] [2022-03-19 07:18:33,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:33,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:18:33,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:33,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:18:33,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:18:33,468 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:33,837 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-03-19 07:18:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 07:18:33,837 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-19 07:18:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:33,838 INFO L225 Difference]: With dead ends: 84 [2022-03-19 07:18:33,838 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 07:18:33,838 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-03-19 07:18:33,838 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:33,839 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 46 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:18:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 07:18:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-03-19 07:18:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-03-19 07:18:33,842 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2022-03-19 07:18:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:33,842 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-03-19 07:18:33,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-03-19 07:18:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 07:18:33,843 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:33,843 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:33,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:34,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:34,043 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash 986713501, now seen corresponding path program 29 times [2022-03-19 07:18:34,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:34,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [567450387] [2022-03-19 07:18:34,190 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:34,190 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:34,203 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:34,203 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:34,203 INFO L85 PathProgramCache]: Analyzing trace with hash 986713501, now seen corresponding path program 30 times [2022-03-19 07:18:34,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:34,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766483408] [2022-03-19 07:18:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:34,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:34,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:34,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766483408] [2022-03-19 07:18:34,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766483408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:34,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869117221] [2022-03-19 07:18:34,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:18:34,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:34,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:34,454 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) [2022-03-19 07:18:34,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 07:18:34,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:18:34,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:34,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 07:18:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-19 07:18:34,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-19 07:18:34,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869117221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:34,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:34,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 23 [2022-03-19 07:18:34,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:34,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [567450387] [2022-03-19 07:18:34,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [567450387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:34,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:34,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 07:18:34,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989697242] [2022-03-19 07:18:34,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:34,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 07:18:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:34,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 07:18:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:18:34,744 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:35,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:35,179 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2022-03-19 07:18:35,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 07:18:35,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-19 07:18:35,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:35,180 INFO L225 Difference]: With dead ends: 88 [2022-03-19 07:18:35,180 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 07:18:35,181 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:18:35,181 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:35,181 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:18:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 07:18:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-03-19 07:18:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:35,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-03-19 07:18:35,184 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2022-03-19 07:18:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:35,185 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-03-19 07:18:35,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-03-19 07:18:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 07:18:35,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:35,185 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:35,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:35,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:35,395 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash -254592709, now seen corresponding path program 31 times [2022-03-19 07:18:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:35,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1772584167] [2022-03-19 07:18:35,642 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:35,642 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:35,660 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:35,660 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:35,660 INFO L85 PathProgramCache]: Analyzing trace with hash -254592709, now seen corresponding path program 32 times [2022-03-19 07:18:35,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:35,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513899781] [2022-03-19 07:18:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:35,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:35,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:35,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:35,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513899781] [2022-03-19 07:18:35,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513899781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:35,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633431872] [2022-03-19 07:18:35,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:18:35,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:35,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:35,965 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) [2022-03-19 07:18:35,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 07:18:36,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:18:36,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-03-19 07:18:36,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-03-19 07:18:36,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633431872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:36,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:36,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6, 6] total 28 [2022-03-19 07:18:36,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:36,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1772584167] [2022-03-19 07:18:36,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1772584167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:36,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:36,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 07:18:36,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735861913] [2022-03-19 07:18:36,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:36,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 07:18:36,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 07:18:36,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-19 07:18:36,448 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:37,020 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2022-03-19 07:18:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 07:18:37,020 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-19 07:18:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:37,021 INFO L225 Difference]: With dead ends: 92 [2022-03-19 07:18:37,021 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 07:18:37,021 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-03-19 07:18:37,022 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:37,022 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 166 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:18:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 07:18:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-03-19 07:18:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-03-19 07:18:37,026 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2022-03-19 07:18:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:37,026 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-03-19 07:18:37,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-03-19 07:18:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 07:18:37,026 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:37,026 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:37,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:37,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:37,227 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:37,227 INFO L85 PathProgramCache]: Analyzing trace with hash 851047769, now seen corresponding path program 33 times [2022-03-19 07:18:37,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:37,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [128607640] [2022-03-19 07:18:37,768 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:37,768 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:37,796 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:37,796 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:37,796 INFO L85 PathProgramCache]: Analyzing trace with hash 851047769, now seen corresponding path program 34 times [2022-03-19 07:18:37,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:37,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747798378] [2022-03-19 07:18:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:38,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:38,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:38,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747798378] [2022-03-19 07:18:38,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747798378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:38,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960819728] [2022-03-19 07:18:38,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:18:38,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:38,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:38,076 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) [2022-03-19 07:18:38,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 07:18:38,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:18:38,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:38,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:38,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-03-19 07:18:38,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-03-19 07:18:38,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960819728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:38,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:38,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 6, 6] total 29 [2022-03-19 07:18:38,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:38,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [128607640] [2022-03-19 07:18:38,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [128607640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:38,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:38,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 07:18:38,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562287485] [2022-03-19 07:18:38,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:38,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 07:18:38,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 07:18:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-03-19 07:18:38,538 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:39,217 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-03-19 07:18:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 07:18:39,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-19 07:18:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:39,218 INFO L225 Difference]: With dead ends: 96 [2022-03-19 07:18:39,218 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 07:18:39,219 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-03-19 07:18:39,219 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:39,219 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 116 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:18:39,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 07:18:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-03-19 07:18:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-03-19 07:18:39,222 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2022-03-19 07:18:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:39,223 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-03-19 07:18:39,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-03-19 07:18:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 07:18:39,223 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:39,223 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:39,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:39,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:39,440 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1780342281, now seen corresponding path program 35 times [2022-03-19 07:18:39,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:39,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1791499203] [2022-03-19 07:18:40,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:40,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:40,198 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:40,198 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:40,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1780342281, now seen corresponding path program 36 times [2022-03-19 07:18:40,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:40,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459860845] [2022-03-19 07:18:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:40,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:40,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:40,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:40,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459860845] [2022-03-19 07:18:40,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459860845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:40,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446928118] [2022-03-19 07:18:40,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:18:40,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:40,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:40,548 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) [2022-03-19 07:18:40,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 07:18:40,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:18:40,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:40,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 07:18:40,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-19 07:18:40,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-19 07:18:40,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446928118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:40,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:40,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 4, 4] total 26 [2022-03-19 07:18:40,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:40,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1791499203] [2022-03-19 07:18:40,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1791499203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:40,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:40,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 07:18:40,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790498467] [2022-03-19 07:18:40,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:40,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 07:18:40,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 07:18:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:18:40,924 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:41,778 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2022-03-19 07:18:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 07:18:41,778 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-19 07:18:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:41,779 INFO L225 Difference]: With dead ends: 100 [2022-03-19 07:18:41,779 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 07:18:41,779 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-19 07:18:41,780 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:41,780 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 07:18:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 07:18:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-03-19 07:18:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-03-19 07:18:41,784 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2022-03-19 07:18:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:41,784 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-03-19 07:18:41,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-03-19 07:18:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 07:18:41,785 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:41,785 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:41,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:41,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:41,996 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash -810442987, now seen corresponding path program 37 times [2022-03-19 07:18:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:41,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [214111768] [2022-03-19 07:18:42,344 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:42,344 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:42,358 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:42,358 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:42,358 INFO L85 PathProgramCache]: Analyzing trace with hash -810442987, now seen corresponding path program 38 times [2022-03-19 07:18:42,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:42,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356576542] [2022-03-19 07:18:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:42,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:42,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:42,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:42,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356576542] [2022-03-19 07:18:42,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356576542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:42,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741348650] [2022-03-19 07:18:42,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:18:42,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:42,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:42,721 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) [2022-03-19 07:18:42,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 07:18:42,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:18:42,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:42,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-03-19 07:18:42,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-03-19 07:18:43,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741348650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:43,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:43,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 6, 6] total 31 [2022-03-19 07:18:43,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:43,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [214111768] [2022-03-19 07:18:43,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [214111768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:43,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:43,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 07:18:43,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729572219] [2022-03-19 07:18:43,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:43,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 07:18:43,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 07:18:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-03-19 07:18:43,190 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:44,127 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-03-19 07:18:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 07:18:44,129 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-19 07:18:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:44,129 INFO L225 Difference]: With dead ends: 104 [2022-03-19 07:18:44,129 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 07:18:44,130 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-03-19 07:18:44,130 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:44,130 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 196 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 07:18:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 07:18:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-03-19 07:18:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-03-19 07:18:44,133 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2022-03-19 07:18:44,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:44,133 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-03-19 07:18:44,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:44,133 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-03-19 07:18:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 07:18:44,134 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:44,134 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:44,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-19 07:18:44,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:44,351 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:44,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash -745124685, now seen corresponding path program 39 times [2022-03-19 07:18:44,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:44,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222082784] [2022-03-19 07:18:44,656 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:44,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:44,671 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:44,671 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:44,671 INFO L85 PathProgramCache]: Analyzing trace with hash -745124685, now seen corresponding path program 40 times [2022-03-19 07:18:44,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:44,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634108644] [2022-03-19 07:18:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:44,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:44,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:44,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:44,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634108644] [2022-03-19 07:18:44,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634108644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:44,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164784990] [2022-03-19 07:18:44,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:18:44,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:44,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:44,999 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) [2022-03-19 07:18:45,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 07:18:45,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:18:45,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-03-19 07:18:45,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-03-19 07:18:45,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164784990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:45,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:45,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 32 [2022-03-19 07:18:45,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:45,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222082784] [2022-03-19 07:18:45,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222082784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:45,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:45,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 07:18:45,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246828045] [2022-03-19 07:18:45,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:45,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 07:18:45,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:45,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 07:18:45,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-03-19 07:18:45,533 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:46,840 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2022-03-19 07:18:46,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 07:18:46,841 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-19 07:18:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:46,841 INFO L225 Difference]: With dead ends: 108 [2022-03-19 07:18:46,841 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 07:18:46,842 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 07:18:46,842 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:46,842 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 07:18:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 07:18:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-03-19 07:18:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-03-19 07:18:46,851 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2022-03-19 07:18:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:46,853 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-03-19 07:18:46,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-03-19 07:18:46,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 07:18:46,854 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:46,854 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:46,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:47,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-19 07:18:47,054 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1896221393, now seen corresponding path program 41 times [2022-03-19 07:18:47,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:47,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1635713751] [2022-03-19 07:18:47,641 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:47,642 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:47,689 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:47,689 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1896221393, now seen corresponding path program 42 times [2022-03-19 07:18:47,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:47,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562525637] [2022-03-19 07:18:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:47,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:48,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:48,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:48,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562525637] [2022-03-19 07:18:48,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562525637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:48,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522988899] [2022-03-19 07:18:48,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:18:48,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:48,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:48,096 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) [2022-03-19 07:18:48,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 07:18:48,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:18:48,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:48,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:18:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-19 07:18:48,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-19 07:18:48,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522988899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:48,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:48,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 29 [2022-03-19 07:18:48,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:48,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1635713751] [2022-03-19 07:18:48,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1635713751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:48,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:48,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 07:18:48,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367244875] [2022-03-19 07:18:48,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:48,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 07:18:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 07:18:48,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-19 07:18:48,520 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:50,080 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2022-03-19 07:18:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 07:18:50,080 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-19 07:18:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:50,081 INFO L225 Difference]: With dead ends: 112 [2022-03-19 07:18:50,081 INFO L226 Difference]: Without dead ends: 62 [2022-03-19 07:18:50,081 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-03-19 07:18:50,082 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:50,082 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 236 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 07:18:50,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-19 07:18:50,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-03-19 07:18:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-03-19 07:18:50,085 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2022-03-19 07:18:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:50,085 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-03-19 07:18:50,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-03-19 07:18:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 07:18:50,086 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:50,086 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:50,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:50,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 07:18:50,300 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1904130415, now seen corresponding path program 43 times [2022-03-19 07:18:50,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:50,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [264824142] [2022-03-19 07:18:51,166 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:51,166 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:51,210 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:51,210 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:51,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1904130415, now seen corresponding path program 44 times [2022-03-19 07:18:51,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:51,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958185820] [2022-03-19 07:18:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:51,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:51,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:51,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:51,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958185820] [2022-03-19 07:18:51,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958185820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:51,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230006880] [2022-03-19 07:18:51,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:18:51,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:51,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:51,702 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) [2022-03-19 07:18:51,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 07:18:51,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:18:51,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:51,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2022-03-19 07:18:51,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2022-03-19 07:18:52,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230006880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:52,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:52,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 6, 6] total 34 [2022-03-19 07:18:52,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:52,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [264824142] [2022-03-19 07:18:52,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [264824142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:52,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:52,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 07:18:52,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54828323] [2022-03-19 07:18:52,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:52,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 07:18:52,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:52,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 07:18:52,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:18:52,279 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:54,711 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-03-19 07:18:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 07:18:54,712 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-19 07:18:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:54,713 INFO L225 Difference]: With dead ends: 116 [2022-03-19 07:18:54,713 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 07:18:54,713 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:18:54,714 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:54,714 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 76 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 07:18:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 07:18:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-03-19 07:18:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-03-19 07:18:54,717 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2022-03-19 07:18:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:54,717 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-03-19 07:18:54,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:18:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-03-19 07:18:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 07:18:54,718 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:54,718 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:54,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 07:18:54,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 07:18:54,919 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:54,919 INFO L85 PathProgramCache]: Analyzing trace with hash 914765965, now seen corresponding path program 45 times [2022-03-19 07:18:54,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:54,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [616350622] [2022-03-19 07:18:55,839 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:55,839 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:55,859 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:18:55,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:18:55,859 INFO L85 PathProgramCache]: Analyzing trace with hash 914765965, now seen corresponding path program 46 times [2022-03-19 07:18:55,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:55,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007618721] [2022-03-19 07:18:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:55,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:56,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:56,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:56,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007618721] [2022-03-19 07:18:56,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007618721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:18:56,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482152194] [2022-03-19 07:18:56,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:18:56,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:18:56,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:56,296 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) [2022-03-19 07:18:56,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 07:18:56,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:18:56,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:18:56,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:18:56,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:18:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2022-03-19 07:18:56,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:18:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2022-03-19 07:18:56,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482152194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:18:56,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:18:56,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 6, 6] total 35 [2022-03-19 07:18:56,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:56,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [616350622] [2022-03-19 07:18:56,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [616350622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:56,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:56,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 07:18:56,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467388983] [2022-03-19 07:18:56,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:56,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 07:18:56,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:56,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 07:18:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:18:56,952 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:19:00,337 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2022-03-19 07:19:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 07:19:00,337 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-19 07:19:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:19:00,337 INFO L225 Difference]: With dead ends: 120 [2022-03-19 07:19:00,337 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 07:19:00,338 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:19:00,338 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:19:00,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 176 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-19 07:19:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 07:19:00,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-19 07:19:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-03-19 07:19:00,341 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2022-03-19 07:19:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:19:00,342 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-03-19 07:19:00,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-03-19 07:19:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 07:19:00,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:19:00,347 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:19:00,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 07:19:00,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:19:00,555 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:19:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:19:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash -676698069, now seen corresponding path program 47 times [2022-03-19 07:19:00,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:00,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1846910647] [2022-03-19 07:19:02,064 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:02,064 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:02,082 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:02,082 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:19:02,082 INFO L85 PathProgramCache]: Analyzing trace with hash -676698069, now seen corresponding path program 48 times [2022-03-19 07:19:02,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:19:02,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499566609] [2022-03-19 07:19:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:19:02,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:19:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:19:02,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:19:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:19:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:19:02,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:19:02,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499566609] [2022-03-19 07:19:02,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499566609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:19:02,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102902186] [2022-03-19 07:19:02,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:19:02,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:19:02,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:19:02,635 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) [2022-03-19 07:19:02,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 07:19:02,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:19:02,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:19:02,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:19:02,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:19:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2022-03-19 07:19:02,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:19:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2022-03-19 07:19:03,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102902186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:19:03,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:19:03,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 32 [2022-03-19 07:19:03,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:19:03,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1846910647] [2022-03-19 07:19:03,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1846910647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:19:03,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:19:03,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 07:19:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693211545] [2022-03-19 07:19:03,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:19:03,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 07:19:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 07:19:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-03-19 07:19:03,148 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:19:07,225 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2022-03-19 07:19:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 07:19:07,226 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-19 07:19:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:19:07,226 INFO L225 Difference]: With dead ends: 124 [2022-03-19 07:19:07,226 INFO L226 Difference]: Without dead ends: 68 [2022-03-19 07:19:07,227 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 07:19:07,227 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:19:07,227 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 206 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-19 07:19:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-19 07:19:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-03-19 07:19:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-03-19 07:19:07,230 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2022-03-19 07:19:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:19:07,231 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-03-19 07:19:07,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-03-19 07:19:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 07:19:07,231 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:19:07,231 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:19:07,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 07:19:07,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 07:19:07,432 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:19:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:19:07,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1065277367, now seen corresponding path program 49 times [2022-03-19 07:19:07,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:07,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2013739447] [2022-03-19 07:19:08,590 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:08,590 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:08,608 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:08,608 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:19:08,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1065277367, now seen corresponding path program 50 times [2022-03-19 07:19:08,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:19:08,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678364590] [2022-03-19 07:19:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:19:08,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:19:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:19:09,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:19:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:19:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:19:09,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:19:09,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678364590] [2022-03-19 07:19:09,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678364590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:19:09,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498007607] [2022-03-19 07:19:09,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:19:09,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:19:09,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:19:09,078 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) [2022-03-19 07:19:09,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 07:19:09,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:19:09,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:19:09,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:19:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:19:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2022-03-19 07:19:09,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:19:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2022-03-19 07:19:09,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498007607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:19:09,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:19:09,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 6, 6] total 37 [2022-03-19 07:19:09,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:19:09,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2013739447] [2022-03-19 07:19:09,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2013739447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:19:09,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:19:09,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 07:19:09,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043084842] [2022-03-19 07:19:09,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:19:09,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 07:19:09,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 07:19:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:19:09,885 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:19:16,240 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2022-03-19 07:19:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 07:19:16,241 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-19 07:19:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:19:16,242 INFO L225 Difference]: With dead ends: 128 [2022-03-19 07:19:16,242 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 07:19:16,242 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:19:16,243 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:19:16,243 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 96 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-03-19 07:19:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 07:19:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-03-19 07:19:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-03-19 07:19:16,251 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2022-03-19 07:19:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:19:16,251 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-03-19 07:19:16,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-03-19 07:19:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 07:19:16,251 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:19:16,252 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:19:16,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 07:19:16,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 07:19:16,463 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:19:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:19:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash -827827993, now seen corresponding path program 51 times [2022-03-19 07:19:16,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:16,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1288126727] [2022-03-19 07:19:18,574 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:18,574 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:18,595 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:18,595 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:19:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash -827827993, now seen corresponding path program 52 times [2022-03-19 07:19:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:19:18,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213714356] [2022-03-19 07:19:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:19:18,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:19:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:19:19,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:19:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:19:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:19:19,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:19:19,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213714356] [2022-03-19 07:19:19,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213714356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:19:19,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771909557] [2022-03-19 07:19:19,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:19:19,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:19:19,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:19:19,074 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) [2022-03-19 07:19:19,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 07:19:19,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:19:19,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:19:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:19:19,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:19:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-03-19 07:19:19,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:19:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-03-19 07:19:19,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771909557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:19:19,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:19:19,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 6, 6] total 38 [2022-03-19 07:19:19,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:19:19,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1288126727] [2022-03-19 07:19:19,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1288126727] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:19:19,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:19:19,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 07:19:19,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702936224] [2022-03-19 07:19:19,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:19:19,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 07:19:19,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:19,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 07:19:19,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:19:19,861 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:19:28,002 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2022-03-19 07:19:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 07:19:28,002 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-19 07:19:28,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:19:28,002 INFO L225 Difference]: With dead ends: 132 [2022-03-19 07:19:28,003 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 07:19:28,003 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 07:19:28,004 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:19:28,004 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 56 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-03-19 07:19:28,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 07:19:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-03-19 07:19:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-03-19 07:19:28,007 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2022-03-19 07:19:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:19:28,007 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-03-19 07:19:28,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-03-19 07:19:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 07:19:28,008 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:19:28,008 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:19:28,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 07:19:28,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:19:28,215 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:19:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:19:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash -272246267, now seen corresponding path program 53 times [2022-03-19 07:19:28,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:28,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445079740] [2022-03-19 07:19:30,334 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:30,335 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:30,361 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:30,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:19:30,361 INFO L85 PathProgramCache]: Analyzing trace with hash -272246267, now seen corresponding path program 54 times [2022-03-19 07:19:30,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:19:30,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390522231] [2022-03-19 07:19:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:19:30,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:19:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:19:30,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:19:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:19:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:19:30,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:19:30,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390522231] [2022-03-19 07:19:30,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390522231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:19:30,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112929983] [2022-03-19 07:19:30,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:19:30,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:19:30,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:19:30,889 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) [2022-03-19 07:19:30,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 07:19:31,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:19:31,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:19:31,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 07:19:31,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:19:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-03-19 07:19:31,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:19:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-03-19 07:19:31,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112929983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:19:31,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:19:31,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 4, 4] total 35 [2022-03-19 07:19:31,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:19:31,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445079740] [2022-03-19 07:19:31,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445079740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:19:31,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:19:31,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 07:19:31,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643675154] [2022-03-19 07:19:31,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:19:31,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 07:19:31,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:31,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 07:19:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:19:31,476 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:19:42,408 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2022-03-19 07:19:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 07:19:42,408 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-19 07:19:42,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:19:42,409 INFO L225 Difference]: With dead ends: 136 [2022-03-19 07:19:42,409 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 07:19:42,409 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:19:42,409 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-03-19 07:19:42,410 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 76 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-03-19 07:19:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 07:19:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-03-19 07:19:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-03-19 07:19:42,413 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2022-03-19 07:19:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:19:42,413 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-03-19 07:19:42,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-03-19 07:19:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 07:19:42,414 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:19:42,414 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:19:42,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 07:19:42,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:19:42,623 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:19:42,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:19:42,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1065847715, now seen corresponding path program 55 times [2022-03-19 07:19:42,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:42,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [673846648] [2022-03-19 07:19:44,079 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:44,080 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:44,104 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:44,104 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:19:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1065847715, now seen corresponding path program 56 times [2022-03-19 07:19:44,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:19:44,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234582668] [2022-03-19 07:19:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:19:44,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:19:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:19:44,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:19:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:19:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:19:44,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:19:44,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234582668] [2022-03-19 07:19:44,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234582668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:19:44,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711647630] [2022-03-19 07:19:44,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:19:44,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:19:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:19:44,661 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) [2022-03-19 07:19:44,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 07:19:44,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:19:44,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:19:44,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:19:44,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:19:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-03-19 07:19:44,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:19:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-03-19 07:19:45,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711647630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:19:45,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:19:45,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 6, 6] total 40 [2022-03-19 07:19:45,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:19:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [673846648] [2022-03-19 07:19:45,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [673846648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:19:45,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:19:45,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 07:19:45,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093996652] [2022-03-19 07:19:45,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:19:45,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 07:19:45,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 07:19:45,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 07:19:45,443 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:19:58,269 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2022-03-19 07:19:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 07:19:58,269 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-19 07:19:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:19:58,270 INFO L225 Difference]: With dead ends: 140 [2022-03-19 07:19:58,270 INFO L226 Difference]: Without dead ends: 76 [2022-03-19 07:19:58,270 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 07:19:58,271 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-03-19 07:19:58,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 136 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2022-03-19 07:19:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-19 07:19:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-03-19 07:19:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-03-19 07:19:58,274 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2022-03-19 07:19:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:19:58,274 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-03-19 07:19:58,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:19:58,274 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-03-19 07:19:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 07:19:58,275 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:19:58,275 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:19:58,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 07:19:58,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:19:58,483 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:19:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:19:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1516024383, now seen corresponding path program 57 times [2022-03-19 07:19:58,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:19:58,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1220743600] [2022-03-19 07:19:59,439 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:59,439 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:59,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:19:59,464 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:19:59,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1516024383, now seen corresponding path program 58 times [2022-03-19 07:19:59,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:19:59,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922848624] [2022-03-19 07:19:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:19:59,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:19:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:20:00,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:20:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:20:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:20:00,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:20:00,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922848624] [2022-03-19 07:20:00,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922848624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:20:00,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095133133] [2022-03-19 07:20:00,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:20:00,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:20:00,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:20:00,038 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) [2022-03-19 07:20:00,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 07:20:00,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:20:00,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:20:00,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:20:00,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:20:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 1 proven. 86 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-03-19 07:20:00,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:20:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-03-19 07:20:00,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095133133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:20:00,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:20:00,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 6, 6] total 41 [2022-03-19 07:20:00,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:20:00,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1220743600] [2022-03-19 07:20:00,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1220743600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:20:00,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:20:00,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 07:20:00,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642727317] [2022-03-19 07:20:00,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:20:00,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 07:20:00,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:20:00,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 07:20:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 07:20:00,938 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:20:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:20:16,962 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2022-03-19 07:20:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 07:20:16,962 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-19 07:20:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:20:16,962 INFO L225 Difference]: With dead ends: 144 [2022-03-19 07:20:16,962 INFO L226 Difference]: Without dead ends: 78 [2022-03-19 07:20:16,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 07:20:16,963 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:20:16,963 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 246 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1874 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2022-03-19 07:20:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-19 07:20:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-03-19 07:20:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:20:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-03-19 07:20:16,967 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2022-03-19 07:20:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:20:16,967 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-03-19 07:20:16,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:20:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-03-19 07:20:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 07:20:16,968 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:20:16,968 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:20:16,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-19 07:20:17,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:20:17,170 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:20:17,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:20:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash -204013473, now seen corresponding path program 59 times [2022-03-19 07:20:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:20:17,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1092534463] [2022-03-19 07:20:18,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:20:18,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:20:18,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:20:18,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:20:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash -204013473, now seen corresponding path program 60 times [2022-03-19 07:20:18,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:20:18,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525298527] [2022-03-19 07:20:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:20:18,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:20:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:20:18,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:20:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:20:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:20:18,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:20:18,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525298527] [2022-03-19 07:20:18,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525298527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:20:18,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785123863] [2022-03-19 07:20:18,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:20:18,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:20:18,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:20:18,715 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) [2022-03-19 07:20:18,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 07:20:18,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:20:18,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:20:18,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:20:18,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:20:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2022-03-19 07:20:19,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:20:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2022-03-19 07:20:19,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785123863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:20:19,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:20:19,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 38 [2022-03-19 07:20:19,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:20:19,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1092534463] [2022-03-19 07:20:19,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1092534463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:20:19,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:20:19,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 07:20:19,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959397572] [2022-03-19 07:20:19,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:20:19,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 07:20:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:20:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 07:20:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:20:19,377 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:20:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:20:37,981 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2022-03-19 07:20:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 07:20:37,981 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-19 07:20:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:20:37,982 INFO L225 Difference]: With dead ends: 148 [2022-03-19 07:20:37,982 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 07:20:37,982 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 07:20:37,982 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:20:37,983 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 196 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time] [2022-03-19 07:20:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 07:20:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-03-19 07:20:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:20:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-03-19 07:20:37,986 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2022-03-19 07:20:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:20:37,986 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-03-19 07:20:37,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:20:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-03-19 07:20:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 07:20:37,987 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:20:37,987 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:20:38,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-19 07:20:38,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-19 07:20:38,187 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:20:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:20:38,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2081913987, now seen corresponding path program 61 times [2022-03-19 07:20:38,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:20:38,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52515713] [2022-03-19 07:20:39,331 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:20:39,331 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:20:39,381 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:20:39,382 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:20:39,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2081913987, now seen corresponding path program 62 times [2022-03-19 07:20:39,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:20:39,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478781523] [2022-03-19 07:20:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:20:39,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:20:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:20:40,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:20:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:20:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:20:40,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:20:40,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478781523] [2022-03-19 07:20:40,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478781523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:20:40,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335078863] [2022-03-19 07:20:40,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:20:40,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:20:40,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:20:40,080 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) [2022-03-19 07:20:40,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 07:20:40,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:20:40,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:20:40,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:20:40,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:20:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2022-03-19 07:20:40,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:20:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2022-03-19 07:20:41,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335078863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:20:41,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:20:41,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 6, 6] total 43 [2022-03-19 07:20:41,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:20:41,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52515713] [2022-03-19 07:20:41,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52515713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:20:41,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:20:41,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 07:20:41,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183938046] [2022-03-19 07:20:41,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:20:41,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 07:20:41,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:20:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 07:20:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 07:20:41,022 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:21:06,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:21:06,115 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2022-03-19 07:21:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 07:21:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-19 07:21:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:21:06,116 INFO L225 Difference]: With dead ends: 152 [2022-03-19 07:21:06,116 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 07:21:06,117 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=1749, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:21:06,117 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:21:06,117 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 56 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 25.0s Time] [2022-03-19 07:21:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 07:21:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-03-19 07:21:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:21:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-03-19 07:21:06,121 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2022-03-19 07:21:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:21:06,121 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-03-19 07:21:06,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:21:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-03-19 07:21:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 07:21:06,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:21:06,121 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:21:06,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-19 07:21:06,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:21:06,324 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:21:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:21:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1436923675, now seen corresponding path program 63 times [2022-03-19 07:21:06,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:21:06,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [519880318] [2022-03-19 07:21:09,221 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:21:09,221 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:21:09,260 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:21:09,260 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:21:09,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1436923675, now seen corresponding path program 64 times [2022-03-19 07:21:09,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:21:09,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469628188] [2022-03-19 07:21:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:21:09,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:21:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:21:09,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:21:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:21:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:21:09,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:21:09,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469628188] [2022-03-19 07:21:09,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469628188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:21:09,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791535643] [2022-03-19 07:21:09,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:21:09,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:21:09,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:21:09,943 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) [2022-03-19 07:21:09,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 07:21:10,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:21:10,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:21:10,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:21:10,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:21:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2022-03-19 07:21:10,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:21:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2022-03-19 07:21:10,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791535643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:21:10,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:21:10,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 6, 6] total 44 [2022-03-19 07:21:10,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:21:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [519880318] [2022-03-19 07:21:10,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [519880318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:21:10,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:21:10,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 07:21:10,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863306440] [2022-03-19 07:21:10,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:21:10,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 07:21:10,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:21:10,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 07:21:10,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1751, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:21:10,939 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:21:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:21:44,179 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2022-03-19 07:21:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 07:21:44,179 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-19 07:21:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:21:44,179 INFO L225 Difference]: With dead ends: 156 [2022-03-19 07:21:44,179 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 07:21:44,180 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 07:21:44,181 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:21:44,181 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 226 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2241 Invalid, 0 Unknown, 0 Unchecked, 33.2s Time] [2022-03-19 07:21:44,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 07:21:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-03-19 07:21:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:21:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-03-19 07:21:44,184 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2022-03-19 07:21:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:21:44,185 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-03-19 07:21:44,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:21:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-03-19 07:21:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 07:21:44,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:21:44,185 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:21:44,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 07:21:44,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:21:44,403 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:21:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:21:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1394312391, now seen corresponding path program 65 times [2022-03-19 07:21:44,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:21:44,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1216129967] [2022-03-19 07:21:47,711 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:21:47,711 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:21:47,741 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:21:47,741 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:21:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1394312391, now seen corresponding path program 66 times [2022-03-19 07:21:47,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:21:47,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860979534] [2022-03-19 07:21:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:21:47,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:21:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:21:48,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:21:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:21:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:21:48,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:21:48,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860979534] [2022-03-19 07:21:48,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860979534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:21:48,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13769136] [2022-03-19 07:21:48,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:21:48,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:21:48,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:21:48,451 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) [2022-03-19 07:21:48,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 07:21:48,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:21:48,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:21:48,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:21:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:21:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2022-03-19 07:21:48,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:21:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2022-03-19 07:21:49,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13769136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:21:49,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:21:49,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 4, 4] total 41 [2022-03-19 07:21:49,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:21:49,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1216129967] [2022-03-19 07:21:49,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1216129967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:21:49,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:21:49,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 07:21:49,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598280753] [2022-03-19 07:21:49,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:21:49,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 07:21:49,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:21:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 07:21:49,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 07:21:49,124 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:22:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:22:27,798 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2022-03-19 07:22:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 07:22:27,798 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-19 07:22:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:22:27,799 INFO L225 Difference]: With dead ends: 160 [2022-03-19 07:22:27,799 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 07:22:27,800 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 07:22:27,800 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:22:27,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 86 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 38.6s Time] [2022-03-19 07:22:27,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 07:22:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-03-19 07:22:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:22:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-03-19 07:22:27,811 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2022-03-19 07:22:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:22:27,811 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-03-19 07:22:27,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:22:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-03-19 07:22:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 07:22:27,812 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:22:27,812 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:22:27,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 07:22:28,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 07:22:28,021 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:22:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:22:28,021 INFO L85 PathProgramCache]: Analyzing trace with hash 797093847, now seen corresponding path program 67 times [2022-03-19 07:22:28,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:22:28,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1803403580] [2022-03-19 07:22:35,864 WARN L232 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 638 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-03-19 07:22:36,118 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:22:36,119 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:22:36,162 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:22:36,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:22:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash 797093847, now seen corresponding path program 68 times [2022-03-19 07:22:36,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:22:36,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56074911] [2022-03-19 07:22:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:22:36,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:22:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:22:36,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:22:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:22:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:22:36,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:22:36,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56074911] [2022-03-19 07:22:36,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56074911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:22:36,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676749716] [2022-03-19 07:22:36,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:22:36,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:22:36,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:22:36,961 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) [2022-03-19 07:22:36,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 07:22:37,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:22:37,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:22:37,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:22:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:22:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2022-03-19 07:22:37,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:22:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2022-03-19 07:22:37,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676749716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:22:37,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:22:37,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 6, 6] total 46 [2022-03-19 07:22:37,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:22:37,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1803403580] [2022-03-19 07:22:37,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1803403580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:22:37,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:22:37,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 07:22:37,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50620573] [2022-03-19 07:22:37,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:22:37,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 07:22:37,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:22:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 07:22:37,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1923, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 07:22:37,862 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:23:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:23:17,865 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2022-03-19 07:23:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 07:23:17,866 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-19 07:23:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:23:17,866 INFO L225 Difference]: With dead ends: 164 [2022-03-19 07:23:17,866 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 07:23:17,867 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=2010, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 07:23:17,867 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.9s IncrementalHoareTripleChecker+Time [2022-03-19 07:23:17,867 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 206 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 39.9s Time] [2022-03-19 07:23:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 07:23:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-03-19 07:23:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:23:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2022-03-19 07:23:17,871 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2022-03-19 07:23:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:23:17,871 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2022-03-19 07:23:17,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:23:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2022-03-19 07:23:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 07:23:17,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:23:17,872 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:23:17,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 07:23:18,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 07:23:18,073 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:23:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:23:18,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2090453771, now seen corresponding path program 69 times [2022-03-19 07:23:18,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:23:18,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2021420285] [2022-03-19 07:23:21,705 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:23:21,705 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:23:21,798 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:23:21,799 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:23:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2090453771, now seen corresponding path program 70 times [2022-03-19 07:23:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:23:21,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870601589] [2022-03-19 07:23:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:23:21,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:23:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:23:22,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:23:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:23:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:23:22,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:23:22,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870601589] [2022-03-19 07:23:22,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870601589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:23:22,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959577125] [2022-03-19 07:23:22,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:23:22,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:23:22,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:23:22,607 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) [2022-03-19 07:23:22,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 07:23:22,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:23:22,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:23:22,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:23:22,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:23:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2022-03-19 07:23:23,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:23:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2022-03-19 07:23:23,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959577125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:23:23,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:23:23,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 6, 6] total 47 [2022-03-19 07:23:23,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:23:23,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2021420285] [2022-03-19 07:23:23,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2021420285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:23:23,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:23:23,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 07:23:23,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642294620] [2022-03-19 07:23:23,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:23:23,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 07:23:23,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:23:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 07:23:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2012, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 07:23:23,605 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:24:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:24:06,435 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2022-03-19 07:24:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 07:24:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-19 07:24:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:24:06,436 INFO L225 Difference]: With dead ends: 168 [2022-03-19 07:24:06,436 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 07:24:06,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=2101, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 07:24:06,436 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.7s IncrementalHoareTripleChecker+Time [2022-03-19 07:24:06,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 226 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2652 Invalid, 0 Unknown, 0 Unchecked, 42.7s Time] [2022-03-19 07:24:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 07:24:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-19 07:24:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:24:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-03-19 07:24:06,440 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2022-03-19 07:24:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:24:06,440 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-03-19 07:24:06,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:24:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-03-19 07:24:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 07:24:06,441 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:24:06,441 INFO L500 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:24:06,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 07:24:06,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 07:24:06,641 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:24:06,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:24:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1820125843, now seen corresponding path program 71 times [2022-03-19 07:24:06,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:24:06,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1985991991] [2022-03-19 07:24:09,821 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:24:09,821 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:24:09,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:24:09,902 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:24:09,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1820125843, now seen corresponding path program 72 times [2022-03-19 07:24:09,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:24:09,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466880033] [2022-03-19 07:24:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:24:09,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:24:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:24:10,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:24:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:24:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 2 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:24:10,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:24:10,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466880033] [2022-03-19 07:24:10,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466880033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:24:10,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325294559] [2022-03-19 07:24:10,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:24:10,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:24:10,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:24:10,753 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) [2022-03-19 07:24:10,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 07:24:10,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:24:10,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:24:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:24:10,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:24:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2022-03-19 07:24:11,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:24:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2022-03-19 07:24:11,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325294559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:24:11,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:24:11,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 4, 4] total 44 [2022-03-19 07:24:11,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:24:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1985991991] [2022-03-19 07:24:11,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1985991991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:24:11,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:24:11,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 07:24:11,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096967864] [2022-03-19 07:24:11,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:24:11,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 07:24:11,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:24:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 07:24:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:24:11,625 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:25:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:25:17,817 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2022-03-19 07:25:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 07:25:17,817 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-19 07:25:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:25:17,818 INFO L225 Difference]: With dead ends: 172 [2022-03-19 07:25:17,818 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 07:25:17,819 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 07:25:17,819 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2725 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:25:17,819 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 46 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2725 Invalid, 0 Unknown, 0 Unchecked, 66.1s Time] [2022-03-19 07:25:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 07:25:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-03-19 07:25:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:25:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-03-19 07:25:17,825 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2022-03-19 07:25:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:25:17,825 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-03-19 07:25:17,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:25:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-03-19 07:25:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 07:25:17,825 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:25:17,825 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:25:17,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-19 07:25:18,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 07:25:18,027 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:25:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:25:18,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1790750897, now seen corresponding path program 73 times [2022-03-19 07:25:18,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:25:18,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [152127860] [2022-03-19 07:25:18,972 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:25:18,972 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:25:19,036 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:25:19,036 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:25:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1790750897, now seen corresponding path program 74 times [2022-03-19 07:25:19,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:25:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243258236] [2022-03-19 07:25:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:25:19,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:25:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:25:19,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:25:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:25:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 2 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:25:19,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:25:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243258236] [2022-03-19 07:25:19,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243258236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:25:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6161702] [2022-03-19 07:25:19,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:25:19,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:25:19,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:25:19,957 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) [2022-03-19 07:25:19,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 07:25:20,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:25:20,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:25:20,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:25:20,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:25:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2022-03-19 07:25:20,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:25:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2022-03-19 07:25:20,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6161702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:25:20,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:25:20,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 6, 6] total 49 [2022-03-19 07:25:20,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:25:20,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [152127860] [2022-03-19 07:25:20,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [152127860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:25:20,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:25:20,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 07:25:20,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616867409] [2022-03-19 07:25:20,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:25:20,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 07:25:20,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:25:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 07:25:20,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2196, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 07:25:20,988 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:26:16,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:26:16,839 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2022-03-19 07:26:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 07:26:16,840 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-19 07:26:16,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:26:16,840 INFO L225 Difference]: With dead ends: 176 [2022-03-19 07:26:16,841 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 07:26:16,841 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=2289, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 07:26:16,842 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2950 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.8s IncrementalHoareTripleChecker+Time [2022-03-19 07:26:16,842 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 236 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2950 Invalid, 0 Unknown, 0 Unchecked, 55.8s Time] [2022-03-19 07:26:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 07:26:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-03-19 07:26:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:26:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-03-19 07:26:16,846 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2022-03-19 07:26:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:26:16,846 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-03-19 07:26:16,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:26:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-03-19 07:26:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 07:26:16,847 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:26:16,847 INFO L500 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:26:16,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 07:26:17,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:26:17,053 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:26:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:26:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash -668768433, now seen corresponding path program 75 times [2022-03-19 07:26:17,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:26:17,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [777838079] [2022-03-19 07:26:19,983 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:26:19,983 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:26:20,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:26:20,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:26:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash -668768433, now seen corresponding path program 76 times [2022-03-19 07:26:20,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:26:20,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268325985] [2022-03-19 07:26:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:26:20,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:26:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:26:20,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:26:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:26:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 2 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:26:20,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:26:20,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268325985] [2022-03-19 07:26:20,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268325985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:26:20,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998589594] [2022-03-19 07:26:20,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:26:20,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:26:20,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:26:20,951 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) [2022-03-19 07:26:20,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 07:26:21,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:26:21,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:26:21,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:26:21,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:26:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 1333 trivial. 0 not checked. [2022-03-19 07:26:21,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:26:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1333 trivial. 0 not checked. [2022-03-19 07:26:22,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998589594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:26:22,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:26:22,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 6, 6] total 50 [2022-03-19 07:26:22,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:26:22,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [777838079] [2022-03-19 07:26:22,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [777838079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:26:22,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:26:22,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 07:26:22,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263925488] [2022-03-19 07:26:22,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:26:22,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 07:26:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:26:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 07:26:22,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2291, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 07:26:22,181 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:27:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:27:22,905 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2022-03-19 07:27:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 07:27:22,905 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-19 07:27:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:27:22,906 INFO L225 Difference]: With dead ends: 180 [2022-03-19 07:27:22,906 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 07:27:22,906 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=164, Invalid=2386, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:27:22,906 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 3139 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 3180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:27:22,907 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 326 Invalid, 3180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3139 Invalid, 0 Unknown, 0 Unchecked, 60.6s Time] [2022-03-19 07:27:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 07:27:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-03-19 07:27:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:27:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2022-03-19 07:27:22,910 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2022-03-19 07:27:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:27:22,911 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2022-03-19 07:27:22,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:27:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2022-03-19 07:27:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 07:27:22,911 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:27:22,911 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:27:22,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 07:27:23,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-19 07:27:23,116 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:27:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:27:23,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2034831763, now seen corresponding path program 77 times [2022-03-19 07:27:23,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:27:23,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1696109011] [2022-03-19 07:27:30,859 WARN L232 SmtUtils]: Spent 7.74s on a formula simplification. DAG size of input: 728 DAG size of output: 1 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-03-19 07:27:31,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:27:31,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:27:31,064 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:27:31,064 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:27:31,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2034831763, now seen corresponding path program 78 times [2022-03-19 07:27:31,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:27:31,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129374856] [2022-03-19 07:27:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:27:31,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:27:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:27:32,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:27:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:27:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 2 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:27:32,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:27:32,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129374856] [2022-03-19 07:27:32,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129374856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:27:32,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934348115] [2022-03-19 07:27:32,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:27:32,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:27:32,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:27:32,060 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) [2022-03-19 07:27:32,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 07:27:32,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:27:32,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:27:32,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:27:32,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:27:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2022-03-19 07:27:32,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:27:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2022-03-19 07:27:33,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934348115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:27:33,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:27:33,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 4, 4] total 47 [2022-03-19 07:27:33,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:27:33,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1696109011] [2022-03-19 07:27:33,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1696109011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:27:33,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:27:33,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-19 07:27:33,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822351324] [2022-03-19 07:27:33,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:27:33,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 07:27:33,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:27:33,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 07:27:33,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 07:27:33,053 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:29:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:29:17,508 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2022-03-19 07:29:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 07:29:17,508 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-19 07:29:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:29:17,509 INFO L225 Difference]: With dead ends: 184 [2022-03-19 07:29:17,509 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 07:29:17,509 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 07:29:17,509 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 3260 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:29:17,510 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 236 Invalid, 3302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3260 Invalid, 0 Unknown, 0 Unchecked, 104.4s Time] [2022-03-19 07:29:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 07:29:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-03-19 07:29:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:29:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-03-19 07:29:17,513 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2022-03-19 07:29:17,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:29:17,514 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-03-19 07:29:17,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:29:17,514 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-03-19 07:29:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 07:29:17,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:29:17,514 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:29:17,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 07:29:17,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-19 07:29:17,715 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:29:17,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:29:17,715 INFO L85 PathProgramCache]: Analyzing trace with hash -561699317, now seen corresponding path program 79 times [2022-03-19 07:29:17,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:29:17,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1710177612] [2022-03-19 07:29:21,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:29:21,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:29:21,900 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:29:21,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:29:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash -561699317, now seen corresponding path program 80 times [2022-03-19 07:29:21,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:29:21,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220620051] [2022-03-19 07:29:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:29:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:29:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:29:22,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:29:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:29:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 2 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:29:22,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:29:22,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220620051] [2022-03-19 07:29:22,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220620051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:29:22,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331470652] [2022-03-19 07:29:22,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:29:22,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:29:22,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:29:22,805 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) [2022-03-19 07:29:22,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 07:29:23,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:29:23,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:29:23,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:29:23,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:29:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 1483 trivial. 0 not checked. [2022-03-19 07:29:23,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:29:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 1483 trivial. 0 not checked. [2022-03-19 07:29:23,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331470652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:29:23,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:29:23,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 6, 6] total 52 [2022-03-19 07:29:23,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:29:23,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1710177612] [2022-03-19 07:29:23,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1710177612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:29:23,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:29:23,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 07:29:23,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849085072] [2022-03-19 07:29:23,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:29:23,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 07:29:23,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:29:23,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 07:29:23,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2487, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 07:29:23,932 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:40,579 INFO L93 Difference]: Finished difference Result 188 states and 193 transitions. [2022-03-19 07:30:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 07:30:40,580 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-19 07:30:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:40,580 INFO L225 Difference]: With dead ends: 188 [2022-03-19 07:30:40,580 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 07:30:40,581 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=170, Invalid=2586, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 07:30:40,581 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 3481 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 3524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:40,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 386 Invalid, 3524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3481 Invalid, 0 Unknown, 0 Unchecked, 76.6s Time] [2022-03-19 07:30:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 07:30:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-03-19 07:30:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2022-03-19 07:30:40,585 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2022-03-19 07:30:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:40,585 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2022-03-19 07:30:40,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2022-03-19 07:30:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 07:30:40,586 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:40,586 INFO L500 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:40,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-19 07:30:40,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-19 07:30:40,786 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:40,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2074340905, now seen corresponding path program 81 times [2022-03-19 07:30:40,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:40,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [780346503] [2022-03-19 07:30:42,255 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:42,255 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:42,299 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:42,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:42,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2074340905, now seen corresponding path program 82 times [2022-03-19 07:30:42,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:42,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915855380] [2022-03-19 07:30:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:42,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:43,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 2 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:30:43,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:43,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915855380] [2022-03-19 07:30:43,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915855380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:43,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404192930] [2022-03-19 07:30:43,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:30:43,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:43,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:43,404 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) [2022-03-19 07:30:43,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 07:30:43,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:30:43,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:43,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:30:43,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2022-03-19 07:30:43,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2022-03-19 07:30:45,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404192930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:45,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:45,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 6, 6] total 53 [2022-03-19 07:30:45,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:45,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [780346503] [2022-03-19 07:30:45,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [780346503] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:45,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:45,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 07:30:45,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685067365] [2022-03-19 07:30:45,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:45,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 07:30:45,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:45,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 07:30:45,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 07:30:45,024 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)